trimester
noun
ˈtrī-ˌme-
Did you know?
Semester, which comes from the Latin words for "six" and "month", has come to mean half an academic year when the year is divided into two segments. When an academic year is divided into three segments, each is called a trimester (which is usually a bit more accurate, since each segment often is close to three months in length). Some colleges operate on the "quarter" system, with the summer being the fourth quarter, but this just means that each quarter is basically a trimester. In a human pregnancy, a trimester is three months long, representing one-third of the nine months that a typical pregnancy lasts.
Examples of trimester in a Sentence
Kate Linderman, Kansas City Star, 5 May 2025
However, third trimester ultrasound has a margin of error of 15%-20% and half the time, the prediction of a big baby — or one who is born over 8 lbs.
—Carson Meyer, People.com, 26 Mar. 2025
In the second half of pregnancy; after 20 weeks gestation
Bleeding is pretty rare in the second and third trimesters.
—Lisa McCarty, SELF, 21 May 2025
In her third trimester, she was diagnosed with gestational diabetes, People magazine reported.
—Stephanie Nolasco, FOXNews.com, 12 May 2025
See All Example Sentences for trimester
Cite this Entry
“Trimester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trimester. Accessed 11 Jun. 2025.
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trimester
noun
ˈtrī-ˌ
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