n. A small sac, cyst, bag, or reservoir of the body; an ordinary histological cell.n. The common sinus of the inner ear; the larger of two sacs in the vestibule of the membranous labyrinth of the ear (the smaller one being the saccule), lodged in the fovea hemielliptica, of oval and laterally compressed shape, communicating with the openings of the membranous semicircular canals, and indirectly also with the saccule. Also called sacculus communis, sacculus hemiellipticus, sacculus semiovalis, utriculus vestibuli.n. In botany, a seed-vessel consisting of a very thin loose pericarp, inclosing a single seed; any thin bottle-like or bladder-like body, as the perigynium of Carex. See cuts under Sarcobatus and Perigynium. Also utriculus in all senses.