cystidea definition

  • noun-plural:
    • An order of Crinoidea, mainly fossils for the Paleozoic rocks. They were frequently roundish or egg-shaped, and frequently unsymmetrical; some were sessile, other people had quick stems.
    • An order of Crinoidea, mainly fossils of the Paleozoic rocks. These were typically roundish or egg-shaped, and sometimes unsymmetrical; some had been sessile, others had brief stems.
  • others:
    • An order of fossil crinoids: similar to Cystoidea (which see).
    • An order of fossil crinoids: similar to Cystoidea (which see).
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