Peritoneum

//ˌpɛ.ɹɪ.təˈniː.əm// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    In mammals, the serous membrane lining the cavity of the abdomen and that is folded over the viscera.
  2. 2
    a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera wordnet
  3. 3
    In animals, the membrane lining the coelom cavity.

Etymology

From Latin peritonaeum, from Ancient Greek περιτόναιον (peritónaion), from περιτόναιος (peritónaios, “stretched or strained over”).

Related phrases

serous membrane

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.