Tag: Acronyms

Here’s the test: if you’ll only use the term once, don’t turn it into an acronym at all — just write it out. If you’ll use it three times or more, define it the first time you write it, unless it’s already more familiar to your reader than the full phrase — nobody needs “deoxyribonucleic acid” spelled out before you write DNA. That’s the whole rule, and most acronym problems in edited manuscripts come from skipping the first half of it.

This is Writing Tip 15, and it comes up constantly for a simple reason: authors reach for an acronym the moment a term feels long, without asking whether they’re actually going to use it enough to earn its keep.

Three questions before you coin an acronym

Is it already common knowledge? DNA, RNA, PCR, MRI — these are more recognisable than the phrases they stand for, so defining them wastes a reader’s time rather than saving it. The same goes for any abbreviation your target journal already lists in a house style guide, or that five or more recently published papers in your field use without definition. If your field already treats it as a word, treat it as a word.

Will you use it again? If a term appears exactly once in the whole manuscript, an acronym adds nothing — the reader has to hold a definition in memory for a payoff that never comes. Write “the anterior cruciate ligament” once and move on; don’t manufacture “ACL” for a single mention.

Will it actually help? Beyond three or four uses, an acronym earns its place: it shortens the sentence, and it makes your paper easier to search and skim. That’s the case for defining it clearly on first use — full term, then the acronym in parentheses — and then using the acronym consistently for the rest of the paper. Don’t switch back to the full term later “for clarity”; that’s usually what causes the confusion it’s trying to avoid.

The abstract is read on its own — define acronyms there too

This is the part authors miss most often. Your abstract doesn’t just sit at the front of your paper — it gets pulled out and read completely alone, in PubMed listings, Google Scholar snippets, conference programmes, and by reviewers deciding whether to read further. If you define an acronym in your introduction but use it undefined in your abstract, the abstract fails on its own terms, even though the full paper is fine.

The practical fix: treat the abstract as a separate document for this one purpose. If an acronym appears in it, define it there on first use — even if you also define it again, properly, when the term reappears in the introduction. Two definitions of the same acronym in one paper isn’t redundant; it’s the abstract and the body doing their separate jobs.

Checking what your target journal actually wants

Some journals keep an approved list of abbreviations you can use without definition — often buried in the “Instructions for Authors” or a style guide PDF, not the submission portal itself. Others say nothing at all and default to house style, meaning you’re working from field convention rather than a written rule. Either way, the answer isn’t something a general guide like this one can promise you, because it changes by journal and gets updated without much notice. Open your target journal’s own author guidelines and search for “abbreviation” or “acronym” before you finalise your terminology — that ten minutes will tell you more than any rule of thumb, including this one.

There’s a short video on when to define acronyms in academic writing if you’d rather watch this than read it, and it also gets its own chapter — on mastering acronyms in academic English writing — in Uni-edit’s book on fixing academic English.

If you’re not sure whether your own acronyms pass this test — or your abstract and body text disagree with each other — that’s exactly the kind of consistency check a full Level 3 edit catches, alongside grammar, structure and phrasing.

And if you’d rather have tips like this land in your inbox before you hit the problem in your own draft, you can sign up for our writing and publication emails.