资料来源 : pyDict

小群,隶属的小组织,子群

资料来源 : Webster's Revised Unabridged Dictionary (1913)

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

资料来源 : WordNet®

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