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Weismannism

American  
[vahys-mahn-iz-uhm] / ˈvaɪs mɑnˌɪz əm /

noun

Biology.
  1. the theories of heredity as expounded by Weismann, especially the theory that all inheritable characteristics are carried in the germ plasm, and that acquired characteristics cannot be inherited.


Weismannism British  
/ ˈvaɪsmənˌɪzəm /

noun

  1. the doctrine of the continuity of the germ plasm. This theory of heredity states that all inheritable characteristics are transmitted by the reproductive cells and that characteristics acquired during the lifetime of the organism are not inherited

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • Weismannian adjective

Etymology

Origin of Weismannism

First recorded in 1890–95; Weismann + -ism

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Bearing of Weismannism on Physiological Selection.—If in view of other considerations I could fully accept Professor Weismann's theory of heredity, it would appear to me in no small measure to strengthen my own theory of physiological selection.

From Project Gutenberg

At the outset it is desirable to be clear upon certain points touching the history of the subject; the limits within which our discussion is to be confined; the relation in which the present essay stands to the one that I published last year under the title An Examination of Weismannism; and several other matters of a preliminary kind.

From Project Gutenberg

But it was not till 1875 that the question was clearly presented to the general public by the independent thought of Mr. Galton, who was led to challenge the Lamarckian factors in toto by way of deduction from his theory of Stirp—the close resemblance of which to Professor Weismann's theory of Germ-plasm has been shown in my Examination of Weismannism.

From Project Gutenberg

It is for these reasons that any attempt at dealing with Weismann's fundamental postulate—i.e. that of the non-inheritance of acquired characters—was excluded from my Examination of Weismannism.

From Project Gutenberg

As there stated, he is justified in assuming, for the purposes of his discussion, a negative answer to the question of such inheritance; but evidently the question itself ought not to be included within what we may properly understand by "Weismannism."

From Project Gutenberg