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Definition of Preformation
1. Noun. 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.
Definition of Preformation
1. n. An old theory of the preëxistence of germs. Cf. Emboîtement.
Definition of Preformation
1. [n -S]