preformation theory — preformation theory. См. теория преформизма. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
Preformation — Pre for*ma tion, n. (Biol.) An old theory of the pre[ e]xistence of germs. Cf. {Embo[^i]tement}. [1913 Webster] … The Collaborative International Dictionary of English
preformation — [prē΄fôr mā′shən] n. 1. previous formation 2. Biol. a former theory that every germ cell contains every part of the future organism in miniature, development being merely growth in size … English World dictionary
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 • Syn: ↑preformation • Derivationally related forms:… … Useful english dictionary
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 • Syn: ↑theory of preformation • Derivationally related… … Useful english dictionary
theory — A reasoned explanation of known facts or phenomena that serves as a basis of investigation by which to seek the truth. SEE ALSO: hypothesis, postulate. [G. theoria, a beholding, speculation, t., fr. theoros, a beholder] adsorption t. of narcosis… … Medical dictionary
preformation — See p. theory. * * * pre·for·ma·tion .prē fȯr mā shən n a now discredited theory in biology that every germ cell contains the organism of its kind fully formed and complete in all its parts and that development involves merely an increase in… … Medical dictionary
preformation — noun Date: 1732 1. previous formation 2. the now discredited theory that every germ cell contains the organism of its kind fully formed and that development involves merely an increase in size compare epigenesis 1, homunculus 2 • preformationist… … New Collegiate Dictionary
preformation — n. [L. prae, before; forma, shape] The archaic theory that the egg (or sperm or zygote) contains a preformed adult in minature, and only nourishment is required during development … Dictionary of invertebrate zoology
preformation — preformationary, adj. /pree fawr may sheuhn/, n. 1. previous formation. 2. Biol. (formerly) the theory that the individual, with all its parts, preexists in the germ cell and grows from microscopic to normal proportions during embryogenesis… … Universalium
