Lamarckism definition

-kē-ə-nĭzəm
A theory of biological evolution holding that physical changes that occur in an organism through purposeful use and disuse of body parts are inherited by its offspring.
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A theory of organic evolution advanced by Lamarck that claimed acquired characters can be inherited.
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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.
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The theory that structural variations, characteristic of species and genera, are produced in animals and plants by the direct influence of physical environments, and especially, in the case of animals, by effort, or by use or disuse of certain organs.
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Alternative Forms

Alternative Form of lamarckism - lamarckianism

Origin of lamarckism

  • After Chevalier de Jean Baptiste Pierre Antoine de Monet Lamarck

    From American Heritage Dictionary of the English Language, 5th Edition