Word Study
preformation
WORDNET DICTIONARY
Noun preformation has 1 sense
- preformation(n = noun.cognition) 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; Array is a kind of theory
Derived form verb preform2
CIDE DICTIONARY
preformation, n.
An old theory of the preëxistence of germs. Cf. Embo. [1913 Webster]
For further exploring for "preformation" in Webster Dictionary Online