Definition of "ganoid" [ga•noid]

• Of, relating to, or characteristic of certain bony fishes, such as the sturgeon and the gar, that have armorlike scales consisting of bony plates covered with layers of dentine and enamel. (adjective)
• A ganoid fish. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "To him, the ganoid was a huge perplexity, none the less because neither he nor the ganoid troubled Darwinians, but the more because it helped to reveal that Darwinism seemed to survive only in England."
• "Two percent of the entire fauna are vertebrates, ganoid-scaled and bony fishes being the most common group."
• "Dense, equidimensional elements, such as teeth and ganoid fish scales, dominate the sandstone assemblage."