Trimester

trimester /tri·mes·ter/ (-mes´ter) a period of three months.

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tri·mes·ter (tr-mstr, trms-)

n.

A period of three months.

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Trimester

The first third or 13 weeks of pregnancy.

Mentioned in: Rubella

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trimester (trīmes´tr),

n one of the three periods of approximately 3 months each into which pregnancy is divided.

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trimester

a period of 3 months.

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trimester Obstetrics A period of 3 months, understood to be during pregnancy; the 1^st trimester is 1-12 wks; the 2^nd trimester is 13-26 wks; the 3^rd trimester is 27 wks to delivery