Dictionary

trimester

trimester

noun tri·mes·ter \(ˌ)trī-ˈmes-tər, ˈtrī-ˌ\

: a period of three months; especially : one of three periods into which a woman's pregnancy is often divided

: one of three periods into which an academic year is sometimes divided

Full Definition of TRIMESTER

1
:  a period of three or about three months; especially :  any of three periods of approximately three months each into which a human pregnancy is divided
2
:  one of three terms into which the academic year is sometimes divided

Examples of TRIMESTER

  1. development in the first trimester

Origin of TRIMESTER

French trimestre, from Latin trimestris of three months, from tri- + mensis month — more at moon
First Known Use: 1821

trimester

noun tri·mes·ter \(ˈ)trī-ˈmes-tər, ˈtrī-ˌ\   (Medical Dictionary)

Medical Definition of TRIMESTER

:  a period of three or about three months; especially :  any of three periods of approximately three months each into which a human pregnancy is divided

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