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trimester

[ trahy-mes-ter, trahy-mes- ]
/ traɪˈmɛs tər, ˈtraɪ mɛs- /
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noun
a term or period of three months.
one of the three approximately equal terms into which the year is divided by some colleges, schools, etc.
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Origin of trimester

1815–25; <French trimestre<Latin trimē(n)stris of three months, equivalent to tri-tri- + -mē(n)stris (see semester)

OTHER WORDS FROM trimester

tri·mes·tral [trahy-mes-truhl], /traɪˈmɛs trəl/, tri·mes·tri·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use trimester in a sentence

British Dictionary definitions for trimester

trimester
/ (traɪˈmɛstə) /

noun
a period of three months
(in some US and Canadian universities or schools) any of the three academic sessions

Derived forms of trimester

trimestral or trimestrial, adjective

Word Origin for trimester

C19: from French trimestre, from Latin trimēstris of three months, from tri- + mēnsis month
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for trimester

trimester
[ trī-mĕstər, trīmĕs′- ]

n.
A period of three months.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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