Lamarckism

Definition of Lamarckism

La´marck´ism
n.1.(Biol.) The theory that structural variations, characteristic of species and genera, are produced in animals and plants by the direct influence of physical environments, and esp., in the case of animals, by effort, or by use or disuse of certain organs. It is a discredited theory, not believed by modern biologists.

Related Words

Neo-Lamarckism, theory of evolution, theory of organic evolution
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