subgroup

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a distinct and often subordinate group within a group (Freq. 1)
• Hypernyms:
group, grouping
• Hyponyms:
bench
2. (mathematics) a subset (that is not empty) of a mathematical group
• Topics:
mathematics, math, maths
• Hypernyms:
group, mathematical group