[ fahy-loj-uh-nee ]
/ faɪˈlɒdʒ ə ni /


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 phy·lo·gen·e·sis [fahy-luh-jen-uh-sis] /ˌfaɪ ləˈdʒɛn ə sɪs/.
Compare ontogeny.

Origin of phylogeny

First recorded in 1865–70; phylo- + -geny

Related forms

phy·lo·ge·net·ic [fahy-luh-juh-net-ik] /ˌfaɪ lə dʒəˈnɛt ɪk/, phy·lo·ge·net·i·cal, phy·lo·gen·ic, adjectivephy·lo·ge·net·i·cal·ly, adverbphy·log·e·nist, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for phylogenesis

  • A similar connection determines the relation between ontogenesis and phylogenesis.

  • We have concentrated the full force of our discussion upon an example drawn from phylogenesis.

    Creative Evolution|Henri Bergson
  • The ontogenesis of any given living organism is a short, condensed recapitulation of its ancestral history or of its phylogenesis.

    The Last Link|Ernst Haeckel

British Dictionary definitions for phylogenesis


phylogenesis (ˌfaɪləʊˈdʒɛnɪsɪs)

/ (faɪˈlɒdʒɪnɪ) /

noun plural -nies or -geneses (-ˈdʒɛnɪˌsiːz)

biology the sequence of events involved in the evolution of a species, genus, etcCompare ontogeny

Derived Forms

phylogenic (ˌfaɪləʊˈdʒɛnɪk) or phylogenetic (ˌfaɪləʊdʒɪˈnɛtɪk), adjective

Word Origin for phylogeny

C19: from phylo- + -geny
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for phylogenesis (1 of 2)


[ fī′lō-jĕnĭ-sĭs ]



Medicine definitions for phylogenesis (2 of 2)


[ fī-lŏjə-nē ]


The evolutionary development and history of a species or higher taxonomic grouping of organisms.phylogenesis
The evolutionary development of an organ or other part of an organism.

Related forms

phy′lo•genic (-jĕnĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for phylogenesis


[ fī-lŏjə-nē ]

The evolutionary development and history of a species or higher taxonomic grouping of organisms.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.