Meaning

noun part of the peritoneum attached to the stomach and to the colon and covering the intestines

noun the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)

originFrom Middle English calle, kelle, kalle, kolle (“caul, net, basket”), from Old English cāwl, cāul, cēawl, cēaul (“basket, container, net, sieve”), of uncertain origin. Reinforced by Old French cale (“close-fitting cap”), possibly a borrowing of the Old English term above, or alternatively related to Old French calotte (“headdress”), from Italian callotta, from Latin calautica (“type of female…

Etymology from Wiktionary, CC BY-SA 3.0