the development or evolution of a particular group of organisms.
the evolutionary history of a group of organisms, especially as depicted in a family tree.
Also, phylogenesis [fahy-luh-jen-uh-sis] .
Compare ontogeny.

1865–70; phylo- + -geny

phylogenetic [fahy-luh-juh-net-ik] , phylogenetical, phylogenic, adjective
phylogenetically, adverb
phylogenist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To phylogeny
World English Dictionary
phylogeny or phylogenesis (faɪˈlɒdʒɪnɪ, ˌfaɪləʊˈdʒɛnɪsɪs)
n , pl -nies, -geneses
biology Compare ontogeny the sequence of events involved in the evolution of a species, genus, etc
[C19: from phylo- + -geny]
phylogenesis or phylogenesis (faɪˈlɒdʒɪnɪ, ˌfaɪləʊˈdʒɛnɪsɪs, -ˈdʒɛnɪˌsiːz)
[C19: from phylo- + -geny]
phylogenic or phylogenesis
phylogenetic or phylogenesis

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"genesis and evolution of a phylum," 1872 (in Darwin), from Ger. Phylogenie, coined 1866 by Ger. biologist Ernst Heinrich Haeckel (1834-1919) from Gk. phylon "race" + -geneia "origin," from -genes "born."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

phylogeny phy·log·e·ny (fī-lŏj'ə-nē)

  1. The evolutionary development and history of a species or higher taxonomic grouping of organisms. Also called phylogenesis.

  2. The evolutionary development of an organ or other part of an organism.

phy'lo·gen'ic (-jěn'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
phylogeny   (fī-lŏj'ə-nē)  Pronunciation Key 
The evolutionary development and history of a species or higher taxonomic grouping of organisms.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Ontogeny does not, actually, recapitulate phylogeny.
Secondly, you're always complaining about cladistics as if all of our hypotheses about archosaur phylogeny are dependent on it.
Ontogeny recapitulates phylogeny, in interactive media as in biological life.
Right now the new human population genomics is robust and informative in phylogeny.
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