User blog comment:Jkphantom9/RWBY Recap Vol 2 by Asian Equation/@comment-4010415-20150821235629/@comment-25396609-20150822031538

I know the official term is volue. i was explaining why people use the terms interchangeably.

as for trimesters/semesters? we don't know whether Beacon uses 1/2, 1/3, or 1/4 school years, so the proper term is not currently known to us. therefore, the more commonly used 'semester' is the default for most.