noun
- a period of three months, especially one of the three divisions of pregnancy or an academic year
Examples
- She is in her second trimester of pregnancy.
- The college operates on a trimester system with three terms per year.
- Morning sickness is common during the first trimester.
- Students must complete four courses each trimester.
- The third trimester can be physically challenging for expectant mothers.
- Registration for the fall trimester begins in August.
- Her doctor scheduled regular checkups throughout each trimester.