epigenesis Meaning, Definition & Usage

  1. noun a geological change in the mineral content of rock after the rock has formed

WordNet

Ep`i*gen"e*sis noun
Etymology
Pref. epi- + genesis.
Definitions
  1. (Biol.) The theory of generation which holds that the germ is created entirely new, not merely expanded, by the procreative power of the parents. It is opposed to the theory of evolution, also to syngenesis.

Webster 1913