Definition of "trimesters" [trimesters]

• Plural form of trimester. (noun)

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• "Pregnancy is divided into 3 time periods called trimesters with each time period lasting about 3 months."
• "Croswell-Lexington High School Principal Theo Kerhoulas called trimesters an "awesome system.""
• "There are three stages of pregnancy, called trimesters, each of which lasts for about th"