Preformation


[pree-fawr-mey-shuh n] /ˌpri fɔrˈmeɪ ʃən/
noun
1.
previous formation.
2.
Biology. (formerly) the theory that the individual, with all its parts, preexists in the germ cell and grows from microscopic to normal proportions during embryogenesis (opposed to epigenesis).
preformation
/ˌpriːfɔːˈmeɪʃən/
noun
1.
the act of forming in advance; previous formation
2.
(biology) the theory, now discredited, that an individual develops by simple enlargement of a fully differentiated egg cell Compare epigenesis (sense 1)

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  • Preformulated

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