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statocyst

[stat-uh-sist]
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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.
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Origin of statocyst

1900–05; stato- (see statoblast) + -cyst
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for statocyst

statocyst

noun
  1. an organ of balance in some invertebrates, such as crustaceans, that consists of a sensory vesicle containing small granulesSee statolith
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012