from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Biology The theory that an individual is developed by successive differentiation of an unstructured egg rather than by a simple enlarging of a preformed entity.
- n. Geology Change in the mineral content of a rock because of outside influences.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The theory that an organism develops by differentiation from an unstructured egg rather than by simple enlarging of something preformed.
- n. changes in the mineral content of rock after its formation
from the GNU version of the Collaborative International Dictionary of English
- n. 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.
from The Century Dictionary and Cyclopedia
- n. The coming into being in the act or process of generation or reproduction; the theory or doctrine of generation in which the germ is held to be actually procreated by the parents, not simply expanded or unfolded or made to grow out of an ovum or spermatozoön in which it preëxisted or had been preformed.
- n. In geology, same as metamorphism.
- n. In pathology, an accessory symptom; a new symptom that does not indicate a change in the nature of a disease.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a geological change in the mineral content of rock after the rock has formed
epi- + -genesis (Wiktionary)