nurocyonA genus of canine quadrupeds, of which the common gray fox of the United States, Urocyon virginianus, is the type, closely related in most respects to Canis and Vulpes. The name is derived from a peculiarity of the hairs of the tail; but more important characters subsist in certain cranial bones, particularly the shape of the angle of the lower jaw-bone. The genus includes the coast-fox of California, U. littoralis. See also cut under Canidæ.
Chambers's Twentieth Century Dictionary
nUrocyonū-ros′i-on a genus of canine quadrupeds, the type of which is the common gray fox of the United States.