Gym"no*dont (j&ibreve;m"n&osl;*d&obreve;nt), n. [Gr. gymno`s naked + 'odoy`s, 'odo`ntos, tooth.] (Zoöl.) One of a group of plectognath fishes (Gymnodontes), having the teeth and jaws consolidated into one or two bony plates, on each jaw, as the diodonts and tetradonts. See Bur fish, Globefish, Diodon.