3학기제의 한 학기
Each of the three terms in an academic year.
예문:
"The university switched from a semester system to a trimester system to offer more flexibility."
"Students are required to complete at least twelve credits during the fall trimester."
임신 기간의 3개월 분기
A period of three months, especially as a division of the duration of pregnancy.
예문:
"Morning sickness is most common during the first trimester of pregnancy."
"The doctor scheduled a detailed ultrasound for the beginning of the second trimester."