sacculus

/ˈsækjələs/
noun
  1. A small sac or pouch; the singular form of sacculi, used especially in anatomy.
    • The researcher studied the structure of the sacculus in frogs.
    • Each sacculus contains tiny crystals that help detect movement.
    • The sacculus is part of the vestibular system in the inner ear.
Synonyms
What does "sacculus" mean? | whatsthatwordmean | whatsthatwordmean