Word Study
trimester
CIDE DICTIONARY
trimester, n. [L. trimestris of three months; tri- (see Tri-) + mensis month: cf. F. trimestre.].
A term or period of three months. [1913 Webster]
OXFORD DICTIONARY
trimester, n. a period of three months, esp. of human gestation or US as a university term.
Derivative
trimestral adj. trimestrial adj.
Etymology
F trimestre f. L trimestris (as TRI-, - mestris f. mensis month)
THESAURUS
trimester
abundant year, academic year, annum, bissextile year, calendar month, calendar year, century, clover, common year, day, decade, decennary, decennium, defective year, deuce-ace, fiscal year, fortnight, hour, leap year, leash, lunar month, lunar year, lunation, luster, lustrum, man-hour, microsecond, millennium, millisecond, minute, moment, month, moon, quarter, quinquennium, regular year, second, semester, session, set of three, shamrock, sidereal year, solar year, sun, tercet, term, ternary, ternion, terzetto, three, threesome, tierce, trefoil, trey, triad, trialogue, triangle, tricorn, trident, triennium, trihedron, trilogy, trine, trinity, trinomial, trio, triphthong, triple crown, triple threat, triplet, triplopy, tripod, triptych, trireme, triseme, triskelion, trisul, triumvirate, triunity, trivet, troika, twelvemonth, week, weekday, yearFor further exploring for "trimester" in Webster Dictionary Online