Source : Webster's Revised Unabridged Dictionary (1913)

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.

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}.