• WordNet 3.6
    • n Lamarckism a theory of organic evolution claiming that acquired characteristics are transmitted to offspring
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Webster's Revised Unabridged Dictionary
    • n Lamarckism (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.
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Century Dictionary and Cyclopedia
    • n Lamarckism In biology, the general body of doctrine propounded by the French naturalist J. B. P. A. de Monet de Lamarck (1744–1829); the theory of evolution as maintained by him at the beginning of the nineteenth century, to the effect that all plants and animals are descended from a common primitive form of life. In its fundamental principles and essential features, Lamarckism differs from Darwinism in assuming that changes resulted from appetency and the active exertion of the organism. See abiogenesis.
    • n Lamarckism The doctrine that the generation of an organism from an egg is epigenesis or new formation.
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Chambers's Twentieth Century Dictionary
    • n Lamarckism la-mär′kizm the theory of the French naturalist, J. B. P. A. de Monet de Lamarck (1744-1829), that species have developed by the efforts of organisms to adapt themselves to new conditions—also Lamarck′ianism
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Webster's Revised Unabridged Dictionary
From Lamarck, a distinguished French naturalist


In literature:

In following Lamarck I am not disturbed by the bogey of teleology, or the ghost of mysticism.
"The Last Harvest" by John Burroughs
Lamarck was one of those men of whom I believe it has been said that they have brain upon the brain.
"Selections from Previous Worksand Remarks on Romanes' Mental Evolution in Animals" by Samuel Butler
"Form and Function" by E. S. (Edward Stuart) Russell
Jean Lamarck did not manifest any taste for the clerical profession.
"Lamarck, the Founder of Evolution" by Alpheus Spring Packard
The use and disuse of organs (Lamarck); (2).
"At the Deathbed of Darwinism" by Eberhard Dennert
Lamarck, 27, 30, 31, 33, 320.
"The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality" by Rudolf Schmid
LAMARCK'S hypothesis very different from the author's, 41.
"Contributions to the Theory of Natural Selection" by Alfred Russel Wallace
It has to be taken in conjunction with the transformism of Lamarck, with which it is in complete harmony.
"Evolution in Modern Thought" by Ernst Haeckel
Lamarck on adaptive characters, 426.
"On the Origin of Species by Means of Natural Selection" by Charles Darwin
He says Lamarck's original animal is something metaphysical, not physical, namely, the will to live.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1" by Various