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Meaning of subgroup

sub•group

Pronunciation: (sub'grp"), [key]
— n.
  1. a subordinate group; a division of a group.
  2. a division of a group in the periodic table.
  3. a subset of a group that is closed under the group operation and in which every element has an inverse in the subset.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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