saccule

Etymology

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

noun

  1. (biology, anatomy) A small sac, pouch, or cyst.
  2. (anatomy) 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.

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