{"id":1253,"date":"2026-07-15T06:07:00","date_gmt":"2026-07-15T06:07:00","guid":{"rendered":"https:\/\/www.editage.com\/blog\/?p=1253"},"modified":"2026-07-29T11:25:57","modified_gmt":"2026-07-29T05:55:57","slug":"abbreviations-academic-writing","status":"publish","type":"post","link":"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/","title":{"rendered":"Using Abbreviations in Academic Writing: A Complete Guide"},"content":{"rendered":"\r\n<p><strong>Key Takeaways<\/strong><\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Define every abbreviation the first time it appears in the main text, then use it consistently for the rest of the document.<\/li>\r\n<li>Style guides such as APA, MLA, and Chicago drop periods from most acronyms and initialisms but keep them in Latin terms like &#8220;e.g.&#8221; and &#8220;i.e.&#8221;<\/li>\r\n<li>Pluralize most abbreviations by adding a lowercase &#8220;s&#8221; with no apostrophe, for example PDFs, IQs, and URLs.<\/li>\r\n<li>Avoid abbreviations in titles and headings unless the term is universally recognized in the field, such as DNA or HIV.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p><strong>Contents<\/strong><\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li><a href=\"#_Toc234488110\">What Counts as an Abbreviation in Academic Writing?<\/a><\/li>\r\n<li><a href=\"#_Toc234488111\">Punctuation Rules for Abbreviations<\/a><\/li>\r\n<li><a href=\"#_Toc234488112\">Where Should You Define an Abbreviation for the First Time?<\/a><\/li>\r\n<li><a href=\"#_Toc234488113\">Pluralizing Abbreviations Correctly<\/a><\/li>\r\n<li><a href=\"#_Toc234488114\">Field-Specific Conventions for Abbreviations<\/a><\/li>\r\n<li><a href=\"#_Toc234488115\">How Can You Tell If an Abbreviation Is Widely Used in a Field?<\/a><\/li>\r\n<li><a href=\"#_Toc234488116\">Abbreviations in Titles and Headings<\/a><\/li>\r\n<li><a href=\"#_Toc234488117\">Abbreviations in Figures and Tables<\/a><\/li>\r\n<li><a href=\"#_Toc234488118\">Overuse of Abbreviations<\/a><\/li>\r\n<li><a href=\"#_Toc234488119\">Quick Reference Checklist<\/a><\/li>\r\n<li><a href=\"#_Toc234488120\">Frequently Asked Questions<\/a><\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#What_Counts_as_an_Abbreviation_in_Academic_Writing\" >What Counts as an Abbreviation in Academic Writing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Punctuation_Rules_for_Abbreviations\" >Punctuation Rules for Abbreviations<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Do_Abbreviations_Need_Periods\" >Do Abbreviations Need Periods?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Ampersands_and_Other_Symbols\" >Ampersands and Other Symbols<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Where_Should_You_Define_an_Abbreviation_for_the_First_Time\" >Where Should You Define an Abbreviation for the First Time?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Pluralizing_Abbreviations_Correctly\" >Pluralizing Abbreviations Correctly<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Field-Specific_Conventions_for_Abbreviations\" >Field-Specific Conventions for Abbreviations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#How_Can_You_Tell_If_an_Abbreviation_Is_Widely_Used_in_a_Field\" >How Can You Tell If an Abbreviation Is Widely Used in a Field?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Abbreviations_in_Titles_and_Headings\" >Abbreviations in Titles and Headings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Abbreviations_in_Figures_and_Tables\" >Abbreviations in Figures and Tables<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Overuse_of_Abbreviations\" >Overuse of Abbreviations<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#What_Are_the_Warning_Signs_of_Overuse\" >What Are the Warning Signs of Overuse?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Quick_Reference_Checklist\" >Quick Reference Checklist<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#How_do_you_pluralize_an_abbreviation_that_ends_in_the_letter_S\" >How do you pluralize an abbreviation that ends in the letter S?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Do_you_italicize_abbreviations_in_APA_style\" >Do you italicize abbreviations in APA style?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Can_you_start_a_sentence_with_an_abbreviation\" >Can you start a sentence with an abbreviation?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#How_many_times_should_you_define_an_abbreviation_in_a_research_paper\" >How many times should you define an abbreviation in a research paper?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Is_it_correct_to_use_%E2%80%9Cetc%E2%80%9D_in_academic_writing\" >Is it correct to use &#8220;etc.&#8221; in academic writing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Should_abbreviations_be_defined_again_in_the_abstract_of_a_paper\" >Should abbreviations be defined again in the abstract of a paper?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#What_is_the_difference_between_an_acronym_and_an_initialism\" >What is the difference between an acronym and an initialism?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/#Do_units_of_measurement_need_to_be_spelled_out_on_first_use\" >Do units of measurement need to be spelled out on first use?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Counts_as_an_Abbreviation_in_Academic_Writing\"><\/span><a id=\"_Toc234488110\"><\/a>What Counts as an Abbreviation in Academic Writing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>An abbreviation is any shortened form of a word or phrase. In <a href=\"https:\/\/www.editage.com\/blog\/what-is-academic-writing-definition-types-examples-characteristics\/\">academic writing<\/a>, the term covers several distinct categories, and knowing the difference helps you apply the correct punctuation and pluralization rules.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Acronyms: pronounced as a single word, for example NASA and laser.<\/li>\r\n<li>Initialisms: pronounced letter by letter, for example CPU and GDP.<\/li>\r\n<li>Truncations: shortened words, for example etc., approx., and vol.<\/li>\r\n<li>Contractions: a word with middle letters dropped, for example Dr. and Mr.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>These categories matter because journals and style guides treat each one differently. An acronym like NASA rarely needs periods, while a truncation like &#8220;vol.&#8221; almost always does.<\/p>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Punctuation_Rules_for_Abbreviations\"><\/span><a id=\"_Toc234488111\"><\/a>Punctuation Rules for Abbreviations<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Punctuation is one of the most inconsistent areas of abbreviation use, since rules vary by style guide, discipline, and even by publisher. Checking your target style guide before submission saves time during revisions.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Do_Abbreviations_Need_Periods\"><\/span>Do Abbreviations Need Periods?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Most modern style guides drop periods from capitalized acronyms and initialisms, such as USA and CPU, but keep periods in lowercase Latin abbreviations like &#8220;e.g.&#8221; and &#8220;i.e.&#8221;<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<td><strong>Style Guide<\/strong><\/td>\r\n<td><strong>Acronyms\/Initialisms<\/strong><\/td>\r\n<td><strong>Latin Abbreviations<\/strong><\/td>\r\n<td><strong>Units of Measure<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>APA<\/td>\r\n<td>No periods (US, IQ)<\/td>\r\n<td>Periods kept (e.g., i.e.)<\/td>\r\n<td>No periods (kg, cm)<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>MLA<\/td>\r\n<td>No periods (US, TV)<\/td>\r\n<td>Periods kept (et al.)<\/td>\r\n<td>No periods (kg, ft)<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Chicago<\/td>\r\n<td>No periods for most<\/td>\r\n<td>Periods kept (etc., vs.)<\/td>\r\n<td>No periods (kg, mph)<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Ampersands_and_Other_Symbols\"><\/span>Ampersands and Other Symbols<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>The ampersand (&amp;) is generally reserved for citations, tables, and reference lists, not for regular prose. In-text, spell out &#8220;and&#8221; instead of using the symbol, unless it is part of an official name, such as a journal title.<\/p>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Where_Should_You_Define_an_Abbreviation_for_the_First_Time\"><\/span><a id=\"_Toc234488112\"><\/a>Where Should You Define an Abbreviation for the First Time?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Define an abbreviation the first time it appears in the <a href=\"https:\/\/www.editage.com\/blog\/how-to-write-abstract\/\">abstract<\/a> and once again in the main text of a <a href=\"https:\/\/www.editage.com\/blog\/how-to-write-a-good-research-paper\/\">research paper<\/a>. Spell out the full term, then place the abbreviation in parentheses immediately after it, so readers can match the two forms.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Spell out the full term, then give the abbreviation in parentheses at first use in the body text.<\/li>\r\n<li>If the abstract also uses the abbreviation, define it there too, since many readers scan only the abstract.<\/li>\r\n<li>Re-define key abbreviations in each new chapter of long documents, such as theses or <a href=\"https:\/\/www.editage.com\/blog\/what-is-a-dissertation-best-practices\/\">dissertations<\/a>.<\/li>\r\n<li>Do not use an abbreviation for a term that appears only 1 or 2 times in the whole document.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>Example: &#8220;Magnetic resonance imaging (MRI) was used to assess&#8230;&#8221; After this first use, write only &#8220;MRI&#8221; for the rest of the paper.<\/p>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Pluralizing_Abbreviations_Correctly\"><\/span><a id=\"_Toc234488113\"><\/a>Pluralizing Abbreviations Correctly<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Pluralizing an abbreviation follows a simpler pattern than pluralizing an ordinary word, but a few exceptions trip up even experienced writers.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Add a lowercase &#8220;s&#8221; with no apostrophe: PDFs, IQs, URLs.<\/li>\r\n<li>For unit abbreviations, do not add an &#8220;s&#8221;: write 10 kg, not 10 kgs.<\/li>\r\n<li>For single letters used as words, an apostrophe can prevent confusion: mind your p&#8217;s and q&#8217;s.<\/li>\r\n<li>For some Latin abbreviations, the letter is doubled instead of adding an &#8220;s&#8221;: pp. for pages, ll. for lines.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<td><strong>Singular<\/strong><\/td>\r\n<td><strong>Plural<\/strong><\/td>\r\n<td><strong>Notes<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>PDF<\/td>\r\n<td>PDFs<\/td>\r\n<td>No apostrophe needed<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>IQ<\/td>\r\n<td>IQs<\/td>\r\n<td>No apostrophe needed<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>p.<\/td>\r\n<td>pp.<\/td>\r\n<td>Doubling convention for Latin abbreviation<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>kg<\/td>\r\n<td>kg<\/td>\r\n<td>Unchanged, since it is a unit abbreviation<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Field-Specific_Conventions_for_Abbreviations\"><\/span><a id=\"_Toc234488114\"><\/a>Field-Specific Conventions for Abbreviations<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Different academic fields have built up their own abbreviation habits over decades, largely shaped by the dominant style guide in that discipline. Matching your field&#8217;s convention signals familiarity with its literature.<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<td><strong>Field<\/strong><\/td>\r\n<td><strong>Common Style Guide<\/strong><\/td>\r\n<td><strong>Typical Abbreviations<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>Medicine<\/td>\r\n<td>AMA Manual of Style<\/td>\r\n<td>mg, IV, BP, ECG<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Law<\/td>\r\n<td>The Bluebook<\/td>\r\n<td>id., cf., et al.<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Sciences<\/td>\r\n<td>CSE or ACS style<\/td>\r\n<td>DNA, RNA, \u00b0C, mL<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Social sciences<\/td>\r\n<td>APA style<\/td>\r\n<td>SD, ANOVA, CI, N<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Humanities<\/td>\r\n<td>MLA or Chicago style<\/td>\r\n<td>ibid., et al., ch.<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<p>If you write across disciplines, such as in a biostatistics paper, follow the style guide required by the target journal rather than mixing conventions from 2 fields.<\/p>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"How_Can_You_Tell_If_an_Abbreviation_Is_Widely_Used_in_a_Field\"><\/span><a id=\"_Toc234488115\"><\/a>How Can You Tell If an Abbreviation Is Widely Used in a Field?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Check whether the abbreviation appears in your field&#8217;s style guide, a standard reference source, or top journals without being defined. If it appears undefined in several recent papers, it is likely well established.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Search recent issues of 2 or 3 leading journals in the field for the abbreviation used without definition.<\/li>\r\n<li>Check the discipline&#8217;s official style guide or glossary of standard abbreviations.<\/li>\r\n<li>Look at <a href=\"https:\/\/www.editage.com\/blog\/conducting-and-reporting-systematic-reviews\/\">systematic reviews<\/a> and <a href=\"https:\/\/www.editage.com\/blog\/meta-analysis\/\">meta-analyses<\/a>, which often use common abbreviations without spelling them out.<\/li>\r\n<li>When in doubt, define it anyway. Readers outside your immediate subfield may not recognize it.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Abbreviations_in_Titles_and_Headings\"><\/span><a id=\"_Toc234488116\"><\/a>Abbreviations in Titles and Headings<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p><a href=\"https:\/\/www.editage.com\/blog\/title-research-paper\/\">Titles<\/a> and headings should generally avoid abbreviations, since they are often read out of context, indexed separately, or displayed in search results and reference lists without the surrounding article.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Use an abbreviation in a title only if it is universally recognized, such as DNA, HIV, or AIDS.<\/li>\r\n<li>Avoid study-specific or niche abbreviations in a title, even if you plan to define them in <a href=\"https:\/\/www.editage.com\/blog\/introduction-research-paper\/\">the introduction<\/a>.<\/li>\r\n<li>If a heading must include an abbreviation, define the full term the first time it appears in the text below that heading.<\/li>\r\n<li>Keep section headings short; an abbreviation should save space, not force the reader to guess its meaning.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<figure class=\"wp-block-table\">\r\n<table>\r\n<thead>\r\n<tr>\r\n<td><strong>Generally Acceptable in Titles<\/strong><\/td>\r\n<td><strong>Best Avoided in Titles<\/strong><\/td>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>DNA, RNA, HIV, AIDS<\/td>\r\n<td>Study-specific acronyms, for example a trial name only your team uses<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>NASA, WHO, UNESCO<\/td>\r\n<td>Niche field abbreviations unfamiliar outside a small subfield<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Abbreviations_in_Figures_and_Tables\"><\/span><a id=\"_Toc234488117\"><\/a>Abbreviations in Figures and Tables<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Space is limited in <a href=\"https:\/\/www.editage.com\/blog\/figures-research-paper\/\">figures<\/a> and <a href=\"https:\/\/www.editage.com\/blog\/how-to-create-tables-for-a-research-paper-examples-and-tips\/\">tables<\/a>, so abbreviations are common there, even when the full term already appears in the main text. Every abbreviation used still needs to be explained somewhere near the display.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>Abbreviate freely inside a table or figure to save space, even if the full term is spelled out in the surrounding text.<\/li>\r\n<li>Add a note below the table or figure that spells out every abbreviation used, typically in alphabetical order.<\/li>\r\n<li>Keep abbreviations consistent between the figure, the table, and the main text; do not switch forms partway through.<\/li>\r\n<li>Do not assume readers will flip back to the text to decode a table&#8217;s abbreviations.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p><strong>Example note: <\/strong>Note. BP = blood pressure; HR = heart rate; CI = confidence interval.<\/p>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Overuse_of_Abbreviations\"><\/span><a id=\"_Toc234488118\"><\/a>Overuse of Abbreviations<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<p>Overusing abbreviations forces readers to memorize many short forms at once, which slows reading and can obscure meaning. A paper crowded with unfamiliar abbreviations often reads more like a code than a piece of scholarship.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"What_Are_the_Warning_Signs_of_Overuse\"><\/span>What Are the Warning Signs of Overuse?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Common warning signs include introducing more than 5 or 6 new abbreviations in a single section, or packing 3 or more abbreviations into 1 sentence, which forces constant mental translation.<\/p>\r\n\r\n\r\n\r\n<ul>\r\n<li>More than 5 or 6 new abbreviations introduced within a single section.<\/li>\r\n<li>An abbreviation used only 2 or 3 times across the entire document.<\/li>\r\n<li>&#8220;Abbreviation soup&#8221;: sentences containing 3 or more abbreviations in a row.<\/li>\r\n<li>Abbreviating common short words, such as writing &#8220;&amp;&#8221; for &#8220;and&#8221; in regular prose.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<p>A practical rule is to abbreviate a term only if it appears 4 or 5 or more times in the document. For papers with many technical terms, such as theses, add a separate list of abbreviations near the front.<\/p>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Quick_Reference_Checklist\"><\/span><a id=\"_Toc234488119\"><\/a>Quick Reference Checklist<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<ul>\r\n<li>Define the term in full at first use, then place the abbreviation in parentheses.<\/li>\r\n<li>Check your target style guide for period rules before submission.<\/li>\r\n<li>Pluralize most abbreviations with a lowercase &#8220;s&#8221; and no apostrophe.<\/li>\r\n<li>Match the abbreviation conventions typical of your field and journal.<\/li>\r\n<li>Avoid abbreviations in titles unless they are universally recognized.<\/li>\r\n<li>Explain every abbreviation used in a figure or table in a note below it.<\/li>\r\n<li>Abbreviate only terms that repeat 4 or 5 or more times in the text.<\/li>\r\n<li>Add a list of abbreviations for long documents with many technical terms.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span><a id=\"_Toc234488120\"><\/a>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"How_do_you_pluralize_an_abbreviation_that_ends_in_the_letter_S\"><\/span>How do you pluralize an abbreviation that ends in the letter S?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Add &#8220;es&#8221; to keep the plural readable, for example SOS becomes SOSs in most style guides, though some publications prefer an apostrophe before the final s for clarity. Check your target journal&#8217;s house style if the result looks awkward.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Do_you_italicize_abbreviations_in_APA_style\"><\/span>Do you italicize abbreviations in APA style?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>No. APA style does not italicize common abbreviations such as SD, CI, or ANOVA. Italics are reserved for statistical symbols like p and n, not for the abbreviations that surround them.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Can_you_start_a_sentence_with_an_abbreviation\"><\/span>Can you start a sentence with an abbreviation?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Yes, most style guides allow it, as long as the abbreviation has already been defined earlier in the text. Some writers still prefer to avoid it at the very start of a paragraph for smoother reading.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"How_many_times_should_you_define_an_abbreviation_in_a_research_paper\"><\/span>How many times should you define an abbreviation in a research paper?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Define it once at first use in the main text, and again in the abstract if it appears there. Very long documents, such as dissertations, often redefine key abbreviations at the start of each new chapter.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Is_it_correct_to_use_%E2%80%9Cetc%E2%80%9D_in_academic_writing\"><\/span>Is it correct to use &#8220;etc.&#8221; in academic writing?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>It is acceptable in informal or parenthetical contexts, but many style guides discourage it in formal prose because it feels vague. A specific list or the phrase &#8220;among others&#8221; is often clearer.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Should_abbreviations_be_defined_again_in_the_abstract_of_a_paper\"><\/span>Should abbreviations be defined again in the abstract of a paper?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Yes. Abstracts are frequently read and indexed on their own, so any abbreviation used there should be defined independently of the main text, even if it repeats the definition given later.<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_an_acronym_and_an_initialism\"><\/span>What is the difference between an acronym and an initialism?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>An acronym is pronounced as a word, such as NASA, while an initialism is pronounced letter by letter, such as CPU. Both are abbreviations, but the pronunciation difference sometimes affects article choice, for example &#8220;an MRI&#8221; versus &#8220;a NASA.&#8221;<\/p>\r\n\r\n\r\n\r\n<h3><span class=\"ez-toc-section\" id=\"Do_units_of_measurement_need_to_be_spelled_out_on_first_use\"><\/span>Do units of measurement need to be spelled out on first use?<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n\r\n\r\n\r\n<p>Generally no. Standard unit abbreviations like kg, cm, and mL are recognized internationally and do not require definition, unlike field-specific or study-specific abbreviations, which always need a first-use definition.<\/p>\r\n","protected":false},"excerpt":{"rendered":"Key Takeaways Define every abbreviation the first time it appears in the main text, then use it consistently for the rest of the document. Style guides such as APA, MLA, and Chicago drop periods from most acronyms and initialisms but keep them in Latin terms like &#8220;e.g.&#8221; and &#8220;i.e.&#8221; Pluralize most abbreviations by adding a [&hellip;]","protected":false},"author":3,"featured_media":1387,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_ayudawp_aiss_exclude":false,"_ayudawp_aiss_summary":"Space is limited in figures and tables, so abbreviations are common there, even when the full term already appears in the main text. Common warning signs include introducing more than 5 or 6 new abbreviations in a single section, or packing 3 or more abbreviations into 1 sentence, which forces constant mental translation. Standard unit abbreviations like kg, cm, and mL are recognized internationally and do not require definition, unlike field-specific or study-specific abbreviations, which always need a first-use definition.","_ayudawp_aiss_summary_provider":"manual","_ayudawp_aiss_summary_hash":"4f548a8767fdc36929c565f6a669ce4e9525563f"},"categories":[5],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Using Abbreviations in Academic Writing: A Complete Guide | Editage<\/title>\n<meta name=\"description\" content=\"Learn the rules of using abbreviations in academic writing, how to pluralize them, where to define them, and usage in figures and tables.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Using Abbreviations in Academic Writing: A Complete Guide | Editage\" \/>\n<meta property=\"og:description\" content=\"Learn the rules of using abbreviations in academic writing, how to pluralize them, where to define them, and usage in figures and tables.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.editage.com\/blog\/abbreviations-academic-writing\/\" \/>\n<meta property=\"og:site_name\" content=\"Educational Articles For Researchers, Students And Authors - 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