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An Ossicle

  1. (anatomy) A small bone (or bony structure), especially one of the three of the middle ear. Ossicles - Wikipedia
  2. (zoology) Bone-like joint or plate, especially:
    1. one of numerous small calcareous structures forming the skeleton of certain echinoderms, as the starfishes;
    2. one of the hard articuli or joints of the stem or branches of a crinoid or encrinite;
    3. one of the several small hard chitinous parts or processes of the gastric skeleton of crustaceans, as in the stomach of a lobster or crawfish.
    4. The skeleton of echinoderms is made of ossicles, linked to each other via muscles and connective tissue.
Synonyms