Pronunciation: (gan'oid), [key]
1. of or pertaining to the Ganoidei, a group of mostly extinct fishes characterized by hard, bony scales, the living species of which include the paddlefishes, sturgeons, and gars.
2. (of the scale of a fish) having a smooth, shiny surface of ganoin or a similar substance.
a ganoid fish.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.