Tetrodon \Tet"ro*don\, n. [Tetra- + Gr. ?, ?, tooth.]

(Zo["o]l.) 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 Revised Unabridged Dictionary (1913)
 

Puffer \Puff"er\, n.

1. One who puffs; one who praises with noisy or extravagant commendation.

2. One who is employed by the owner or seller of goods sold at suction to bid up the price; a by-bidder. --Bouvier.

3. (Zo["o]l.)
   (a) Any plectognath fish which inflates its body, as the species of Tetrodon and Diodon; -- called also blower, puff-fish, swellfish, and globefish.

Source: Webster's Revised Unabridged Dictionary (1913)