Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Biology A taxonomic category of related organisms ranking below a family and above a genus.
  • noun Linguistics A division of languages below a family and above a branch.

from The Century Dictionary.

  • noun In zoology, the first subdivision of a family, containing several genera or only one genus.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Biol.) One of the subdivisions, of more importance than genus, into which certain families are divided.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun taxonomy A taxonomic category ranking between a family and a genus; formerly called a tribe

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (biology) a taxonomic category below a family

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

sub- +‎ family

Examples

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