gyrfalcon

[ jur-fawl-kuh n, -fal-, -faw-kuh n ]
/ ˈdʒɜrˌfɔl kən, -ˌfæl-, -ˌfɔ kən /

noun

a large falcon, Falco rusticolus, of arctic and subarctic regions, having white, gray, or blackish color phases: now greatly reduced in number.
Also gerfalcon.

Origin of gyrfalcon

1300–50; Middle English gerfaucon, jerfacoun < Middle French, Old French, equivalent to ger- (perhaps < Old High German giri greedy) + faucon falcon; compare Old Norse geirfalki
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for gyrfalcon

gyrfalcon

gerfalcon

/ (ˈdʒɜːˌfɔːlkən, -ˌfɔːkən) /

noun

a very large rare falcon, Falco rusticolus, of northern and arctic regions: often used for hunting

Word Origin for gyrfalcon

C14: from Old French gerfaucon, perhaps from Old Norse geirfalki, from geirr spear + falki falcon
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