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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.]


(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


(ləˈmɑr kɪz əm)

the Lamarckian theory that characteristics acquired by habit, use, or disuse may be passed on to future generations through inheritance.


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
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
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.
So Lamarckian evolution is a continuous struggle impelled by a force within the organism.
Would we understand the change in living organisms over time if Darwin had not gone on his voyages on the Beagle and disproved Lamarckian evolution (Darwin, 1859)?