Ga'noid adjective [ Greek ... brightness + -oid .] (Zoology) Of or pertaining to Ganoidei. -- noun One of the Ganoidei. Ganoid scale (Zoology) , one kind of scales of the ganoid fishes, composed of an inner layer of bone, and an outer layer of s... Found on http://www.encyclo.co.uk/webster/G/8
The ganoids or Ganoidei are an order of fish. The families of this order are chiefly characterized by angular, rhomboidal, polygonal, or circular scales composed of horny or bony plates covered with a thick plate of glossy enamel-like substance. Found on http://www.probertencyclopaedia.com/browse/BG.HTM