Source : Webster's Revised Unabridged Dictionary (1913)

Subspecies \Sub*spe"cies\, n.
   A group somewhat lessdistinct than speciesusually are, but
   based on characters more important than those which
   characterize ordinary varieties; often, a geographical
   variety or race.

Source : WordNet®

subspecies
     n : (biology) a taxonomic group that is a division of a species;
         usually arises as a consequence of geographical isolation
         within a species [syn: {race}]