/jerr"fawl'keuhn, -fal'-, -faw'keuhn/ , n.
a large falcon, Falco rusticolus, of arctic and subarctic regions, having white, gray, or blackish color phases: now greatly reduced in number.
Also, gerfalcon .
[ 1300-50; ME gerfaucon, jerfacoun ger- (perh. giri greedy) + faucon FALCON; cf. ON geirfalki ]