Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Biology A taxonomic category of related organisms ranking between an order and a family.
  • n. A subdivision of a category termed an order.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A taxonomic category below order and above infraorder.

from the GNU version of the Collaborative International Dictionary of English

  • n. A division of an order; a group of genera of a little lower rank than an order and of greater importance than a tribe or family.

from The Century Dictionary and Cyclopedia

  • n. In botany and zoology, a subdivision of an order; a group subordinate to an order; a superfamily. See family, 6, and order, n., 5.
  • n. In architecture, a subordinate or secondary order; an order introduced for decoration, or chiefly so, as distinguished from a main order of the structure.
  • n. In petrography, in the quantitative classification of igneous rocks (see rock), a division lower than order and higher than rang.

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

  • n. (biology) taxonomic group that is a subdivision of an order

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