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Meaning of statocyst

stat•o•cyst

Pronunciation: (stat'u-sist"), [key]
— n. Zool.
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.