Preformation meaning

prēfôr-māshən
The act of shaping or forming in advance; prior formation.
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A theory popular in the 1700s that all parts of an organism exist completely formed in the germ cell and develop only by increasing in size.
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Previous formation.
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A former theory that every germ cell contains every part of the future organism in miniature, development being merely growth in size.
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The act of shaping or forming in advance; prior formation.
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A theory popular in the 1700s that all parts of an organism exist completely formed in the germ cell and develop only by increasing in size.
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Prior formation.
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(biology, historical) The theory that organisms are fully developed in the form of an egg or seed, and just increase in size (as opposed to epigenesis.
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Origin of preformation