- Anatomy. the smaller of two sacs in the membranous labyrinth of the internal ear.Compare utricle(def 3).
- a little sac.
noun plural -cules or -li (liː)
- a small sac
- the smaller of the two parts of the membranous labyrinth of the internal earCompare utricle (def. 1)
n. pl. sac•cules
- A small sac.
- The smaller of two membranous sacs in the vestibule of the inner ear.