Quote Originally Posted by Kesnit View Post
Wait, what?? I've seen (and been using) transman since I came out 17 years ago.



Cis- and trans- are prefixes. The first time I saw them was in an organic chemistry class in college. They literally mean "same side" and "opposite side."

Calling someone a transgenderwoman, on the other hand, is a problem. Transgender is an adjective. But transwoman is grammatically correct.
Trans- and cis- are indeed prefixes, however in this usage they've been used to form the words transgender and cisgender.

Trans and cis in this case are informal abbreviations of those words, not prefixes.