trimester

[ trahy-mes-ter, trahy-mes- ]

noun

1. a term or period of three months.
2. one of the three approximately equal terms into which the year is divided by some colleges, schools, etc.

trimester

/ traɪˈmɛstə /

noun

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

Derived Forms

• triˈmestral, adjective

Other Words From

• tri·mes·tral [trahy-, mes, -tr, uh, l], tri·mestri·al adjective

Word History and Origins

Origin of trimester¹

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

Word History and Origins

Origin of trimester¹

C19: from French trimestre , from Latin trimēstris of three months, from tri- + mēnsis month

Example Sentences

Constitutional Amendment G is seen as a more restrictive proposal, as it would only enshrine rights in the state constitution for an abortion in the first trimester of pregnancy.

From Salon

“We had no elevator, and I was little to no help as I had just found out I was pregnant and the first trimester nausea had hit bad,” Materna recalled.

From Salon

In Scotland, Wales and England antenatal screening which tests for anomalies is offered to all pregnant women in the first trimester – between 11 and 13 weeks.

From BBC

They labeled abortions in the third trimester “partial birth abortions,” even though only about 0.9% of abortions occur after 21 weeks, and then almost invariably because the pregnancy has experienced a catastrophic crisis.

From Los Angeles Times

New mothers are more likely to suffer depression if they are exposed to certain types of air pollution in the second trimester of pregnancy, researchers say.

From Los Angeles Times