Sign up ×
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It's 100% free, no registration required.

When using the acronym package, how can you correctly pluralize an acronym which ends on 'S'?

Take the acronym: OS - operating system

It should be pluralized as OS's, but is pluralized as OSs when using \acp.

share|improve this question

1 Answer 1

up vote 22 down vote accepted

To define plural exceptions, you can use \acrodefplural:


\acrodefplural{OS}[OS's]{Operating Systems}



\acro{OS}{Operating System}


enter image description here

More information can be found on Section 2.3.1 Non standard and foreign plural forms of the acronym package documentation.

share|improve this answer
It's so difficult to google for this stuff. I remember googling for "latex acronym plural exception" and nothing interesting showed up. Perhaps it's just a matter of knowing where to look, and TeX is a great help! Thanks. –  Steven Jeuris Dec 17 '11 at 20:16
@StevenJeuris: You're welcome! Now, thanks to your question, if I google for "latex acronym plural exception", this question appears in the second place, so now other users will find a quick solution ;-) –  Gonzalo Medina Dec 17 '11 at 20:20
When I use this solution the usages of the plural form of that acronym no longer gives a link to the acronym list. Why is that? Can it be solved? –  Kajsa Jul 28 at 9:47

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.