The arctic fox, Vulpes lagopus, and especially the blue fox subspecies.(noun)
Any species of the genus Vulpes.(noun)
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Use "dog-fox" in a sentence
"Captain did not know what were the running powers of a dog-fox in"
"It was a lovely dog-fox in its prime, with a handsome, thick, winter coat: a lovely golden-red colour, with grey as it passed to the belly, and belly all white, and a great full brush with a delicate black and grey and pure white tip."
"What connection is there between a galley and dog-fox?"