subtribe

noun
sub·​tribe | \ ˈsəb-ˌtrīb How to pronounce subtribe (audio) \
variants: or sub-tribe
plural subtribes or sub-tribes

Definition of subtribe

: a tribe that is part of a larger tribe According to tradition the Arapaho were formerly composed of five subtribes, or bands …— Barbara A. Leitch

First Known Use of subtribe

1823, in the meaning defined above

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