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Theory of Preformation

nounid 148937·updated May 18, 2026
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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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synonym
preformation
plural
Theory of Preformations
possessive
Theory of Preformation's
pluralpossessive
Theory of Preformations'

Framework definitions

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§1
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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