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 (lə-mär′kĭz′əm) also La·marck·i·an·ism (-kē-ə-nĭz′əm)
A theory of biological evolution holding that the changes occurring in an organism through use and disuse of its body parts in response to environmental change are inherited by its offspring.

[After Chevalier Jean Baptiste Pierre Antoine de Monet de Lamarck.]
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.


(Biology) the theory of organic evolution proposed by Lamarck, based on the principle that characteristics of an organism modified during its lifetime are inheritable. See also acquired characteristic, Neo-Lamarckism
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ləˈmɑr kɪz əm)

the Lamarckian theory that characteristics acquired by habit, use, or disuse may be passed on to future generations through inheritance.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


the theory of organic evolution advanced by the French naturalist Lamarck that characteristics acquired by habit, diseases, or adaptations to change in environment may be inherited. — Lamarckian, n., adj.
See also: Evolution
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Lamarckism - a theory of organic evolution claiming that acquired characteristics are transmitted to offspring
evolutionism, theory of evolution, theory of organic evolution - (biology) a scientific theory of the origin of species of plants and animals
Neo-Lamarckism - a modern Lamarckian theory emphasizing the importance of environmental factors in genetic changes and retaining the notion of the inheritance of acquired characters
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Tennyson's initial excitement over Lamarckian evolution, the doubts raised by Lyell's exposure of repeated destruction and extinctions, and the more hopeful framework Tennyson derived from Chambers's evolutionary model is by now a familiar reference-point in Tennyson studies.
"Isn't that Lamarckian evolution?" e-mailed Paul Hyer.
This perspective shares the principles of Lamarckian evolution; thus, disregarding the Darwinian perspective that the author used when defining the term for the first time.
So Lamarckian evolution is a continuous struggle impelled by a force within the organism.