What is (a) One of the two lobes which form the lower lip, or metastome, of Crustacea. (b) One of the small, horny, toothlike jaws of certain annelids called?

paragnathus — (a) One of the two lobes which form the lower lip, or metastome, of Crustacea. (b) One of the small, horny, toothlike jaws of certain annelids. (Webster's 1913.)

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