otoconia

noun plural
oto·​co·​nia | \-ˈkō-nē-ə \

Medical Definition of otoconia 

: small crystals of calcium carbonate in the saccule and utricle of the ear that under the influence of acceleration in a straight line cause stimulation of the hair cells by their movement relative to the gelatinous supporting substrate containing the embedded cilia of the hair cells

called also statoconia

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