Noun: trimester trI'me-stu(r)
- A period of three months; especially one of the three three-month periods into which human pregnancy is divided
"She was in her second trimester when they announced the pregnancy"
- One of three divisions of an academic year
"The university operated on a trimester system"
Derived forms: trimesters
Type of: academic session, academic term, period, period of time, school term, session, time period, time span
Part of: academic year, gestation, gestation period, school year
Encyclopedia: Trimester