preformation, identical with the original meaning of evolution, which see.
preformation: the doctrine of growth or development from already existing rudiments; opposed to epigenesis: q.v.
In this respect it is like its predecessor, the theory of preformation of the eighteenth century.
Let us first cast a historical glance at the older ontogeny, and the theory of preformation which is connected with it.
His shrewd comment on the preformation notion of development has been quoted (p. 20).