peritoneum

/ˌpɛ.ɹɪ.təˈniː.əm/

pɛ · ɹɪ · TƏNIː · əm (4 syllables)

English Noun

Definition

In mammals, the serous membrane lining the cavity of the abdomen and that is folded over the viscera.

Etymology

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