PREFORMATION

preformation, theory of preformation

(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

Source: WordNet® 3.1


Etymology

Noun

preformation (countable and uncountable, plural preformations)

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).

Source: Wiktionary


Pre`for*ma"tion, n. (Biol.)

Definition: An old theory of the preëxistence of germs. Cf. Emboîtement.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

2 April 2025

COVERT

(adjective) secret or hidden; not openly practiced or engaged in or shown or avowed; “covert actions by the CIA”; “covert funding for the rebels”


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Coffee Trivia

Hawaii and California are the only two U.S. states that grow coffee plants commercially.

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