1. of or relating 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.
  1. a ganoid fish.

Origin of ganoid

1830–40; < French ganoïde < Greek gán(os) brightness + -oïde -oid
Related formssub·gan·oid, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ganoid

Historical Examples of ganoid

British Dictionary definitions for ganoid


  1. (of the scales of certain fishes) consisting of an inner bony layer and an outer layer of an enamel-like substance (ganoin)
  2. denoting fishes, including the sturgeon and bowfin, having such scales
  1. a ganoid fish

Word Origin for ganoid

C19: from French ganoïde, from Greek ganos brightness + -oid
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012