lithocyst definition

  • noun:
    • A sac containing otoliths, present medusae also invertebrates.
    • A sac containing small, calcareous concretions (otoliths). They are found in many Medusæ, and other invertebrates, and are supposed to be auditory organs.
    • In zoology, among the sense-organs or marginal bodies of the Lucernarida or steganophthalmate medusans.
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