peritoneum
noun /ˌperɪtəˈniːəm/
/ˌperɪtəˈniːəm/
(plural peritoneums, peritonea
(anatomy) /ˌperɪtəˈniːə/
/ˌperɪtəˈniːə/
)- the membrane (= very thin layer of tissue) on the inside of the abdomen that covers the stomach and other organsWord Originlate Middle English: via late Latin from Greek peritonaion, from peritonos ‘stretched round’, from peri- ‘around’ + -tonos ‘stretched’.