utricle
utri.cle \'yu:-tri-k*l\ n [L utriculus, dim. of uter leather bag] : any of various small pouches or saccate parts of an animal or plant body : as : the part of the membranous labyrinth of the ear into which the semicirc ular canals open : a small one-celled usu. indehiscent one-seeded or few-seeded achene wit h thin membranous pericarp