From The Collaborative International Dictionary of English v.0.48 [gcide]: kit \kit\, n. [See Kitten.] A kitten. [1913 Webster] Kit fox (Zool.), a small burrowing fox (Vulpes velox), inhabiting the region of the Rocky Mountains. It is brownish gray, reddish on the breast and flanks, and white below. Called also swift fox. [1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
Vulpes velox
n 1: small grey fox of the plains of western North America [syn:
kit fox, prairie fox, Vulpes velox]