Source : Webster's Revised Unabridged Dictionary (1913)

Ganoid \Ga"noid\, a. [Gr. ? brightness + -oid.] (Zo["o]l.)
   Of or pertaining to Ganoidei. -- n. One of the Ganoidei.

   {Ganoid scale} (Zo["o]l.), one kind of scales of the ganoid
      fishes, composed of an inner layer of bone, and an outer
      layer of shining enamel. They are often so arranged as to
      form a coat of mail.

Source : WordNet®

ganoid
     n : primitive fishes having thick bony scales with a shiny
         covering [syn: {ganoid fish}]