crinoidea definition

  • noun-plural:
    • A large class of Echinodermata, including many extinct households and genera, but comparatively couple of living ones. The majority of the fossil species, like some which can be present, were attached by a jointed stem. See blastoidea, cystoidea, comatula.
  • others:
    • A class of Echinodermata containing globular or cup-shaped echinoderms, having, typically, jointed hands furnished with pinnules, and stalked and fixed during some or their everyday lives: so called from similarity of their rayed bodies, borne upon a jointed stem, to a lily or tulip.
    • the normal order of this course Crinoidea, having the body cup-shaped or calyx-like. the dorsal or aboral area furnished with difficult calcareous dishes, the ventral or oral aspect coriaceous, while the human anatomy stalked and rooted, at least for some period or even continuously, and provided with five or maybe more radiated segmented arms bearing pinnules and disconnected through the visceral cavity.
  • noun:
    • water lilies

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