Statocyst
noun, Zoology.
1.
(in certain invertebrates) a sense organ consisting of a sac enclosing sensory hairs and particles of sand, lime, etc., that functions in maintaining equilibrium, serving to indicate position in space.
noun
1.
an organ of balance in some invertebrates, such as crustaceans, that consists of a sensory vesicle containing small granules See statolith
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