Definition of sacculus in English:

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Pronunciation: /ˈsakyələs/


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 that send signals to the brain concerning the orientation of the head.
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.
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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