sacculus

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sac·cule

 (săk′yo͞ol) also sac·cu·lus (-yə-ləs)
n. pl. sac·cules also sac·cu·li (săk′yə-lī′)
1. A small sac.
2. The smaller of two membranous sacs in the vestibule of the inner ear.

[Latin sacculus, diminutive of saccus, bag; see sack1.]

sac•cule

(ˈsæk yul)

n.
1. the smaller of two sacs in the membranous labyrinth of the inner ear.
2. a little sac.
[1830–40; < Latin sacculus]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sacculus - a small sac or pouch (especially the smaller chamber of the membranous labyrinth)
membranous labyrinth - the sensory structures of the inner ear including the labyrinthine receptors and the cochlea; contained within the bony labyrinth
sac - a structure resembling a bag in an animal