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.
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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

phylogenesis phy·lo·gen·e·sis (fī'lō-jěn'ĭ-sĭs)
See phylogeny.

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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