A group of individuals agreeing in common attributes, and
   designated by a common name; a conception subordinated to another
   conception, called a genus, or generic conception, from which it
   differs in containing or comprehending more attributes, and extending
   to fewer individuals. Thus, man is a species, under animal as a genus;
   and man, in its turn, may be regarded as a genus with respect to
   European, American, or the like, as species.