trimester
Pronunciation:
/tɹaɪˈmɛs.tə(ɹ)//tɹaɪˈmɛs.təɹ/noun
Definitions
A period of three months or about three months; quarter.
Example: 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.
Example: The school operates on a trimester schedule.