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preformation

[ pree-fawr-mey-shuhn ]

noun

  1. previous formation.
  2. Biology. (formerly) the theory that the individual, with all its parts, preexists in the germ cell and grows from microscopic to normal proportions during embryogenesis ( epigenesis ).


preformation

/ ˌːɔːˈɪʃə /

noun

  1. the act of forming in advance; previous formation
  2. biology the theory, now discredited, that an individual develops by simple enlargement of a fully differentiated egg cell Compare epigenesis
“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
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Other yvlog Forms

  • Эǰ·tDz·· adjective
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yvlog History and Origins

Origin of preformation1

First recorded in 1725–35; pre- + formation
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Example Sentences

Examples have not been reviewed.

The peculiar charm of this idea—called preformation—was that it was infinitely recursive.

From

In France, the theory was called “embodiment”; in England, “preformation” or “preexistence.”

From

The opposing views of to-day were in existence centuries ago, and they are known in the history of science as the theory of preformation or evolution, and the theory of epigenesis.

From

We mistake our power of analyzing our inner world, for its preformation, i. e. the genealogist thinks himself both originator and founder.

From

Weismann is so far right, he admits, from his materialistic premisses when he starts with preformations.

From

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