sub·group 
(sŭbgrp′)
(sŭbgrp′)n.
1. A distinct group within a group; a subdivision of a group.
2. A subordinate group.
3. Mathematics A group that is a subset of a group.
tr.v. sub·grouped, sub·group·ing, sub·groups
To divide into subgroups.
- percurrent
- percuss
- percussion
- percussion cap
- percussion instrument
- percussionist
- percussive
- percussively
- percussiveness
- percutaneous
- percutaneous coronary intervention
- percutaneously
- Percy
- Percy
- Percy Bysshe
- Percy Lavon
- (Percy) Wyndham
- per diem
- perdition
- perdu
- perdue
- perdurability
- perdurable
- perdurably
- perdure