[ˈsakjʊlʊs], (Noun)

Definitions:
- the smaller of the two fluid-filled sacs forming part of the labyrinth of the inner ear (the other being the utriculus). It contains a region of hair cells and otoliths which send signals to the brain concerning the orientation of the head


Phrases:

Origin:
mid 18th century: from Latin, diminutive of saccus ‘sack’