Definition of "grayling" [gray•ling]

• Any of several freshwater food and game fishes of the genus Thymallus of the Northern Hemisphere, having a small mouth and large dorsal fin. (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.

• "In Montana today, the grayling is a “high profile” species in fisheries programs."
• "But the chief glory of the grayling is the large iridescent fin on his back."
• "Charles Cotton, the ingenious young friend of Walton, was all wrong in calling the grayling "one of the deadest-hearted fishes in the world.""