The Collaborative International Dictionary of English v.0.48:

Alopex \Alopex\ prop. n.
   a genus of arctic foxes.

   Syn: genus Alopex.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Alopex
    n 1: arctic foxes [syn: Alopex, genus Alopex]