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Ancient Greek γάνος (gános, brightness, sheen) +‎ -oid



  1. Having a smooth, shining surface, as if polished or enameled: specifically applied to those scales or plates of fishes which are generally of an angular form and composed of a bony or hard horny tissue overlaid with enamel.
  2. Having ganoid scales or plates, as a fish; specifically, of or pertaining to the Ganoidei.


ganoid (plural ganoids)

  1. (zoology) One of the Ganoidei, a disused taxonomic grouping of fishes, including the bowfin, gars, and sturgeons.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for ganoid in
Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913.)