mesentery (the membrane that attaches the intestines to the wall of the abdomen, maintaining their position in the abdominal cavity, and supplying them with blood vessels, nerves, and lymphatics)
köken: Borrowed from Ancient Greek περιτόναιον (peritónaion), from περιτόναιος (peritónaios), from περίτονος (perítonos, “covered with something stretched over”) + -αιος (-aios, “adjective suffix”).
köken: Uncertain. Related to бу́ла (búla, “Turkish woman”), so the meaning may have shifted by metonymy to refer to certain types of face veils that Turkish women once wore (e.g. yashmak).
Attested in local Medieval Latin documents as tauca, from a substrate pre-Latin language, from Proto-Indo-European *tewh₂- (“to swell”). Cognate with Portuguese touca, Spanish toca, Basque taika.