noun (n)

• (biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species(noun.group)

  Synonym:
  race
  

  source: wordnet30
• 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.(noun)

  source: webster1913