Medical Definition of macula acustica
: either of two small areas of sensory hair cells in the ear located in the saccule ( macula sacculi \ -ˈsak-yə-ˌlī \ ) and in the utricle ( macula utriculi \ -yu̇-ˈtrik-yə-ˌlī \ ) that are covered with gelatinous material on which are located crystals or concretions of calcium carbonate and that are associated with the perception of equilibrium
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