tri‧mes‧ter /trɪˈmestə $ traɪˈmestər/
noun [countable][
Date: 1800-1900;
Language: French;
Origin: trimestre, from Latin trimestris, from tri- 'three' + mensis 'month']
1. American English one of three periods of equal length that the school year is divided into
Synonym : term British English2. one of the three-month periods of
pregnancy [TahlilGaran] Dictionary of Contemporary English ▲