# trimester

> English word · Noun · IPA /ˈtɹ(a)ɪ.mɛs.tə(ɹ)/ · frequency rank #26,637

## Definitions
1. A period of three months or about three months; (financial): quarter.
2. One of the terms of an academic year in those learning institutions that divide their teaching in three roughly equal terms, each about three months long. Compare semester.

## Etymology
PIE word
 *tréyes
From French trimestre, from Latin trimestris (“of three months”), from trēs (“three”) + mensis (“month”).

## Easily confused with
- **Trieste** (https://plainspell.com/en/vs/trieste-vs-trimester)
- **trickster** (https://plainspell.com/en/vs/trickster-vs-trimester)

## Common misspellings (14)
`rtimester`, `tirmester`, `triemster`, `trimesetr`, `trimesster`, `trimesterr`, `trimestre`, `trimestter`, `trimetser`, `trimmester`, `trimseter`, `trmiester`, `trrimester`, `ttrimester`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/trimester