trimester
/ˈt(ʃ)ɹaɪ.mɛs.təɹ/ noun C1- A period of three months or about three months; (financial): quarter. · She is in the second trimester of her first pregnancy.
- One of the terms of an academic year in those learning institutions that divide their teaching in three roughly equal terms, each about three months long. Compare semester. · The school operates on a trimester schedule.
Plural trimesters
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