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Related to orthogenesis: Saltationism, orthogneiss


1. Biology The hypothesis, now largely discredited, that the evolution of species is linear and driven largely by internal factors rather than by natural selection.
2. Anthropology The hypothesis that all cultures evolve in a linear manner from primitivism to civilization.

or′tho·ge·net′ic (-jə-nĕt′ĭk) adj.
or′tho·ge·net′i·cal·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Biology) biology
a. evolution of a group of organisms predetermined to occur in a particular direction
b. the theory that proposes such a development
2. (Sociology) the theory that there is a series of stages through which all cultures pass in the same order
orthogenetic adj
ˌorthogeˈnetically adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɔr θoʊˈdʒɛn ə sɪs)

a. evolution of a species proceeding by continuous structural changes without presenting a branching pattern of descent.
b. a theory that such evolution of a species is due to a predetermined series of alterations and not subject to natural selection.
2. a hypothetical parallelism between the stages through which every culture necessarily passes in spite of secondary conditioning factors.
or`tho•ge•net′ic (-dʒəˈnɛt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


progressive evolution, leading to the development of a new form, as can be seen through successive generations. See also society. — orthogenetic, adj.
See also: Biology
progressive evolution, leading to the development of a new form, as can be seen through successive generations. See also society. — orthogenetic, adj.
See also: Evolution
the sociological theory that all cultures or societies follow the same fixed course of determinate evolution. See also evolution. — orthogenetic, adj.
See also: Society
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Such neo-Darwinian iterations of vitalism, as well as of Lamarckism, were often, then, theories of orthogenesis: theories that held that evolution, arrowlike, moves toward a particular endpoint because of internal forces rather than the adaptive value of happenstance variations.
Prior to forming OrthoPediatrics, he spent seven years with DePuy Orthopaedics, a Johnson & Johnson company where he was responsible for healthcare compliance administration, medical affairs, and Orthogenesis (custom devices).
This use of the concept of construction is most congenial to a developmental analysis of origins of psychological structures, especially those organized around the concepts of epigenesis (Gottlieb & Lickliter, 2007) and orthogenesis (Werner & Kaplan, 1984).
Purpose in evolution would have received more attention, with, perhaps, more emphasis on orthogenesis (an innate drive for linear complexification).
As a guiding principle, Werner took the embryogenetic principle of orthogenesis and translated it to mental development.
On orthogenesis and the impotence of natural selection in species-formation.
We are very excited about our results because this would be the first example of degenerate orthogenesis occurring at a cellular level," he said.
A survey of early-20th-century evolutionists would find significant support for at least four different theories of organic variation: Lamarckism, which relies on the heritability of acquired characteristics; orthogenesis, which posits internal developmental forces within living things; gross mutation, in which new species are created in a single leap without an incremental process of natural selection; and hybrid crossing, in which existing gene-based traits flow from one species to another.
Enlightened by these criteria, there is nothing inherently threatening to the natural selection theory in the work of physicist Ilya Prigogine and his colleagues on what might be called 'orthogenesis through fluctuations' (Corning, 1995).
Peter Bowler describes the "non-Darwinian revolution" of the fin-de-siecle, which accepted the basic idea of transmutation of species but substituted for the mechanism of natural selection a whole host of alternatives: orthogenesis, neo-Lamarckism, saltationism and others.
Those adhering to these theories claimed that orthogenesis better fit the actual evidence from the fossil record.