preformationary

preformation

[pree-fawr-mey-shuhn]
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 ).

Origin:
1725–35; pre- + formation

preformationary, adjective
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World English Dictionary
preformation (ˌpriːfɔːˈmeɪʃən)
 
n
1.  the act of forming in advance; previous formation
2.  biology Compare epigenesis the theory, now discredited, that an individual develops by simple enlargement of a fully differentiated egg cell

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