Prior formation. / (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).

plural of preformation

An object that has undergone preliminary shaping but is not yet in its final form. / (archaeology) The rough, incomplete and unused basic form of a stone tool.

To shape something before some other operation.

Misspelling of perform.

plural of preform

Third-person singular simple present indicative form of preform

simple past tense and past participle of preform

formed, constructed or assembled in advance

present participle of preform