Paragnathous :: Paragnathous (a.) Having both mandibles of equal length, the tips meeting, as in certain birds..
Paragnathus :: Paragnathus (n.) One of the two lobes which form the lower lip, or metastome, of Crustacea..
Paragnathus :: Paragnathus (n.) One of the small, horny, toothlike jaws of certain annelids..