fourth trimester

noun

The period from the birth of a baby to when the baby is about three months old.

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Meanings

nounfourth trimester (plural fourth trimesters)

plural fourth trimesters

  1. medicineThe period from the birth of a baby to when the baby is about three months old.
Cite this entry
APA

fourth trimester. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/fourth%20trimester

MLA

“fourth trimester.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fourth%20trimester. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “fourth trimester,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/fourth%20trimester.

Source: fourth trimester on Wiktionary, CC BY-SA 4.0.