Definition of sacculus in English:


Line breaks: sac¦cu|lus
Pronunciation: /ˈsakjʊlʊs


  • 1The 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.
    More example sentences
    • The maculae consist of rather shapeless compartments known as the sacculus and utriculus.
    • A characterization of the ion channels which make a hair cell electrically resonant was obtained via studies of the bullfrog sacculus, a receptor for ground-borne vibration and low-frequency sound.
    • Because the sacculus is buried deep within the ear, Todd and his colleagues could not measure its reaction to sound directly.
  • 1.1 another term for saccule.
    More example sentences
    • Next to these developing scars, enlarged alveolar sacculi with loss of septae and bronchiolization were observed.
    • Sacculus formation is common, but rupture of a sacculus is very rare.
    • Ultrasonography is used for the diagnosis and follow-up of the progression of the uterine sacculus until its disappearance.


mid 18th century: from Latin, diminutive of saccus 'sack'.

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