Topic: BIRTH
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| Date: | 1800-1900 |
| Language: | French |
| Origin: | trimestre, from Latin trimestris, from tri- 'three' + mensis 'month' |
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tri‧mes‧ter
[countable]
[countable]1 American EnglishSE one of three periods of equal length that the school year is divided into [= term British English]
2MB one of the three-month periods of pregnancy
