Search Result for "subgroup": 
Wordnet 3.0

NOUN (2)

1. a distinct and often subordinate group within a group;

2. (mathematics) a subset (that is not empty) of a mathematical group; 



The Collaborative International Dictionary of English v.0.48:

Subgroup \Sub"group`\, n. (Biol.)
   A subdivision of a group, as of animals. --Darwin.
   [1913 Webster]


WordNet (r) 3.0 (2006):

subgroup
    n 1: a distinct and often subordinate group within a group
    2: (mathematics) a subset (that is not empty) of a mathematical
       group