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1. (n.) preformation
previous formation.
2. preformation
a former biological theory that the individual preexists fully formed in the germ cell and grows from microscopic to normal proportions during the embryo phase.
Etymology: (1725–35)
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| Definition of 'preformation' |
Princeton's WordNet |
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1. (noun) preformation, theory of preformation
a theory (popular in the 18th century and now discredited) that an individual develops by simple enlargement of a tiny fully formed organism (a homunculus) that exists in the germ cell
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| Definition of 'preformation' |
Webster Dictionary |
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1. (noun) preformation
an old theory of the preexistence of germs. Cf. Embo/tement
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Definitions of preformation 
