Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A period or term of three months.
- noun One of three terms into which an academic year is divided in some universities and colleges.
from The Century Dictionary.
- noun A term or period of three months.
from the GNU version of the Collaborative International Dictionary of English.
- noun A term or period of three months.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun   A period of three months or about three months.
- noun   One of the terms of anacademic year in those learning institutions that divide their teaching in three roughly equal terms, each about three months long. Comparesemester .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun one of three divisions of an academic year
- noun a period of three months; especially one of the three three-month periods into which human pregnancy is divided
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
Support
 
				Help support Wordnik (and make this page ad-free) by adopting the word trimester.
Examples
- 
								You may hear the word trimester period of three months a lot while you’re pregnant. The Official Lamaze® Guide Judith Lothian RN 2010 
- 
								Exposure in the first trimester is particularly toxic, and unfortunately this is often before many women realize they are pregnant. 
- 
								Pregnant couples are “supposed to” hang on to their secret until the first trimester is over. 
- 
								Potentiality during the first trimester is weak, particularly among older women. Morgentaler Maligned Into A Murderer « Unambiguously Ambidextrous 2008 
- 
								I do believe you could find definately find a majority that would concur that third trimester abortions are killing, and I believe you could even find a majority that believe second trimester is killing. 
- 
								The 3rd trimester is 28 weeks, and at that point you have a baby. 
- 
								For the record, I think that aborting anything past the first trimester is a seriously bad idea. 
- 
								And, whoever said 2nd trimester is the honeymoon period probably also didn’t fight in their first year of marriage, doesn’t go to bed angry, and has kids who sleep. 
- 
								In fact, many scientists believe even the fetus cannot feel pain until the third trimester, which is after about 99 percent of abortions are performed. Camille Veselka: A Detrimental Influence: The Effect Religion Has on Laws Camille Veselka 2011 
- 
								As for the mainstream part: according to Zogby, only 4% of Americans support elective abortion aka “abortion on demand” through the second trimester, which is the law under Roe and its progeny. The Volokh Conspiracy » Ricci and the Sotomayor Nomination: 2009 
- 
								There is a phrase to describe the first twelve weeks of human life: “the fourth trimester.” Audrey Wollen: “A Unified Theory of the Handbag" Audrey Wollen 2025 
Comments
Log in or sign up to get involved in the conversation. It's quick and easy.