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trimester

trimester

39 3.9
A three-month period during pregnancy
  • noun
  • /traɪˈmɛstər/
translation icon : trimestre
  • Bleeding during pregnancy is common especially during the first trimester and usually no cause for alarm.
  • first trimester
  • second trimester
  • third trimester

They checked her urinary fluoride output each trimester, so three times.

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Examples

  • OK so I'm very pregnant right now, still in the first trimester but the symptoms hit.

  • So I'm actually through my first trimester, yes.

  • And my first trimester was pretty like by the books.

  • So still feels like first trimester but I am better.

  • It's meant to stop after the first trimester.

  • Just went so slowly and the second trimester was the complete opposite.

  • We had a rough couple of weeks at the end of the first trimester, when she wanted to repaint the whole house.

  • Between 28 weeks and 40 weeks, the third trimester, the baby triples its weight.

    Academic text (2007)
  • Our study confirmed a statistically significant difference between the two during the third trimester of pregnancy.

    Academic text (2007)
  • Many women report feeling tired during the first trimester of their pregnancy.

Compounds

first trimester
  • Specialized
14 3.1

The first three months of pregnancy when the baby starts to grow

third trimester
  • Specialized
11 3.5

A period of pregnancy from week 28 until the baby is born

second trimester
  • Specialized
8 3.1

A period of pregnancy from week 13 to week 27

Surface Forms

trimester singular
trimesters plural

Morphology

trimester = semester (transparent) = tri + mester

Formed from the prefix 'tri-' (three) applied to the '-mester' element (as in 'semester'/'-mester' meaning a month/term); the 'three-month' meaning is directly inferable.

Etymology

Trimester comes from the Latin parts tri- 'three' and mensis 'month'. So it literally means 'three months', which is why doctors use trimesters to talk about the stages of pregnancy.