The Collaborative International Dictionary of English v.0.48:

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]

WordNet (r) 3.0 (2006):

kit fox
    n 1: small grey fox of southwestern United States; may be a
         subspecies of Vulpes velox [syn: kit fox, Vulpes
         macrotis]
    2: small grey fox of the plains of western North America [syn:
       kit fox, prairie fox, Vulpes velox]