- 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.
Origin of trimester
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for trimester
She was in her second trimester when she and her husband were given a grim prognosis.Women Share Their Secret Abortion Stories For 1 in 3 Campaign
November 20, 2014
Each of these studies found that exposure to starvation during the first trimester of pregnancy appeared to do the most harm.How Famines Make Future Generations Fat
May 11, 2014
In France, for example, abortion is available in the first trimester but heavily restricted after.When Fame Is the Reason for Abortion, Does That Make It Wrong?
April 30, 2014
Bear in mind that the Mississippi legislature is only in session for 90 days each year—or basically one trimester.Mississippi, Get Over Your Abortion Fixation
April 2, 2014
Then, at the end of the first trimester, John drops a bombshell: there is not one love-child, but two.If The Peace Talks Were A Movie
December 12, 2013
- a period of three months
- (in some US and Canadian universities or schools) any of the three academic sessions
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
Word Origin and History for trimester
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.