pedicellaria definition

  • noun:
    • a tiny, stalk-shaped structure of sea urchin also echinoderms, with three pincer-like frameworks by the end that perform cleaning functions and serve as security against predators.
    • A peculiar forcepslike organ which does occur in vast quantities upon starfishes and echini. Those of starfishes have two movable jaws, or blades, consequently they are typically almost, or very, sessile; those of echini normally have three jaws and a pedicel. See Illustration in Appendix.
    • In echinoderms, a little two-pronged pincer-like body upon the outside, at the time of a starfish, attached to the spines and also to the body-wall. See cut-under Echinoidea.

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