subgroup

A distinct group within a group; a subdivision of a group.

A subordinate group.

A group that is a subset of a group.

To divide into subgroups.

Any subordinate group in classification; a subdivision of a group; especially, a division the name of which begins with sub-, as subfamily or subgenus.

A mathematical group forming part of another group.

A subdivision of a group, as of animals.

A group within a larger group; a group whose members are some, but not all, of the members of a larger group.

A subset H of a group G that is itself a group and has the same binary operation as G.

To divide or classify into subgroups