Science Dictionary
classification  [%PREMIUM_LINK%]     (klās'ə-fĭ-kā'shən)  Pronunciation Key 
The systematic grouping of organisms according to the structural or evolutionary relationships among them. Organisms are normally classified by observed similarities in their body and cell structure or by evolutionary relationships based on the analysis of sequences of their DNA. See more at cladistics, Linnean. See Table at taxonomy.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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