Webster's Revised Unabridged Dictionary · 1913

(Zoology) An order of ganoid fishes, including the modern gar pikes and many allied fossil forms. They have rhombic, ganoid scales, a heterocercal tail, paired fins without an axis, fulcra on the fins, and a bony skeleton, with the vertebra convex in front and concave behind, forming a ball and socket joint. See Ganoidel ∗.