n. (Zool.) A plectognath fish of the genera Diodon, Tetrodon, and allied genera. The globefishes can suck in water or air and distend the body to a more or less globular form. Called also porcupine fish, and sea hedgehog. See Diodon. [ 1913 Webster ]
(n) any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers, Syn. pufferfish, globefish, blowfish