Tet"ro*don (?), n. [Tetra- + Gr. , , tooth.] Zool.
Any one of numerous species of plectognath fishes belonging to Tetrodon and allied genera. Each jaw is furnished with two large, thick, beaklike, bony teeth.
[Written also
tetradon.]
⇒ The skin is usually spinous, and the belly is capable of being greatly distended by air or water. It includes the swellfish, puffer (a), and similar species.
© Webster 1913.