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.

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Taxonomy
Lamarckism, mechanism, Lamarckian, organisms, evolution, Darwin, generation, soft inheritance, theory, the offspring, organ, rats, experiment, Jean-Baptiste Lamarck, characteristics, disuse, genes, Lamarckian evolution.

Defination from the web:
Lamarckism (or Lamarckian inheritance) is the once popularly accepted, but since mainly discredited, idea that an organism can pass on ... A form of Lamarckism was revived in the Soviet Union of the 1930s when Trofim Lysenko promoted Lysenkoism which suited the ideological opposition ...