Saccule

//ˈsæk.juːl// noun

Definitions

Noun
  1. 1
    A small sac, pouch, or cyst.
  2. 2
    a small sac or pouch (especially the smaller chamber of the membranous labyrinth) wordnet
  3. 3
    The smaller of the two fluid-filled sacs forming part of the labyrinth of the inner ear (the other being the utricle). It contains a region of hair cells and otoliths which send signals to the brain concerning the orientation of the head.

Etymology

Borrowed from Latin sacculus (“a little sack or bag”), diminutive of saccus (“a bag, sack”). Doublet of sacculus.

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