Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of lamarckism is as below...

Lamarckism :: Lamarckism (n.) 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..

Lamarckianism :: Lamarckianism (n.) Lamarckism.

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