Tetrodon
Pronunciation : Tet"ro*don
Part of Speech : n.
Etymology : [Tetra- + Gr. (Zo?l.)
Definition : Defn: 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.]
Note: 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.
Source : Webster's Unabridged Dictionary, 1913