Search Dictionary
Definition of trimester

trimester

/traɪˈmɛstər/
tri · mes · ter
Adverb:trimestrally
•
Plural:trimesters
•
Adjective:trimestral
JUMP TO:

trimester Lexical Profile

trimester Game Scores & Validity

• noun

1

Each of the three roughly three-month periods into which human pregnancy is divided for medical tracking and care.

Example

"Morning sickness is most common during the first trimester, though it often subsides by the fourth month."

2

One of three terms or divisions of an academic year at a school, college, or university.

Example

"Under the university's calendar system, students can complete an accelerated degree by taking classes during the summer trimester."

Synonyms
View all synonyms for trimester

• Rhymes for trimester

• Nearby Words

trilobite
trilogy
trim
trimester
trimix
trimly
trimmer

Word Origin & Etymology

Borrowed in the early 19th century from German Trimester or French trimestre, both derived from Latin trimestris ('of three months'), combining tri- ('three') and mensis ('month').

Cite this Entry

Wordmom. (2026). Definition of Trimester. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/trimester
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.