preformation

/pree-fawr-mey-shuhn/US // ˌpri fɔrˈmeɪ ʃən //UK // (ˌpriːfɔːˈmeɪʃən) //

成型前,预成型,预制构件,预制

Definitions

n.名词 noun

1
- : previous formation.
- : Biology. the theory that the individual, with all its parts, preexists in the germ cell and grows from microscopic to normal proportions during embryogenesis.

Let us first cast a historical glance at the older ontogeny, and the theory of preformation which is connected with it.
In any case, we can state today that the cytoplasm contains the rough preformation of the future embryo.
It is interesting to display the essential contrast between preformation and epigenesis in the poetical words of Wolff himself.
In this respect it is like its predecessor, the theory of preformation of the eighteenth century.
Preformation, identical with the original meaning of evolution, which see.