Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to Lamarckianism: catastrophism


 (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.
References in periodicals archive ?
Others, Whitman among them, adapted it (or misunderstood it) as a new twist on Lamarckianism, an older theory of evolution.
"The Interminable Decline of Lamarckianism in France." The Reception of Charles Darwin in Europe.