D defs.my
Entry 1 sense Webster, 1913

Utriculus

· U·tric·u·lus · IPA /jʊˈtɹɪk.jəl.əs/
01 n. A little sac, or bag; a utricle; especially, a part of the membranous labyrinth of the ear. See the Note under Ear.
  1. 1.
    A little sac, or bag; a utricle; especially, a part of the membranous labyrinth of the ear. See the Note under Ear.(Anat.) See: Ear