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n. pl. grayling or gray·lings
Any of several freshwater salmonid fishes of the genus Thymallus of northern North America and Eurasia, having a small mouth and a large dorsal fin and valued as a food and game fish.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
n, pl -ling or -lings
1. (Animals) any freshwater salmonoid food fish of the genus Thymallus and family Thymallidae, of the N hemisphere, having a long spiny dorsal fin, a silvery back, and greyish-green sides
2. (Animals) any butterfly of the satyrid genus Hipparchia and related genera, esp H. semele of Europe, having grey or greyish-brown wings
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any freshwater game fish of the genus Thymallus, related to the trout.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.