• WordNet 3.6
    • n epigenesis a geological change in the mineral content of rock after the rock has formed
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Webster's Revised Unabridged Dictionary
    • n Epigenesis (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.
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Century Dictionary and Cyclopedia
    • n epigenesis 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. Thus, in its application to plants, this theory maintains that the embryo does not preëxist in either the ovary or the pollen, but is generated by the union of the fecundating principles of the male and female organs. In zoology the doctrine supplanted the theory of incasement (see incasement), as held by both the animalculists and the ovulists, and may be considered to have itself “incased” the germ of all modern doctrines of ontogenetic biogeny, or evolution of the individual from preexisting individuals. The theory was promulgated in substance in 1759 by C. F. Wolff, and in a modified form, as above, is the doctrine now accepted.
    • n epigenesis In geology, same as metamorphism.
    • n epigenesis In pathology, an accessory symptom; a new symptom that does not indicate a change in the nature of a disease.
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Chambers's Twentieth Century Dictionary
    • n Epigenesis ep-i-jen′e-sis the development of the organism by the growth and differentiation of a single germ—i.e. by the division or segmentation of a fertilised egg-cell
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Webster's Revised Unabridged Dictionary
Pref. epi-, + genesis,
Chambers's Twentieth Century Dictionary
Gr. epi, upon, genesis, genesis.


In literature:

This point established, two hypotheses remain: that of 'pre-existence' and that of 'epigenesis'.
"Lectures and Essays" by T.H. Huxley
We find nothing in Lamarck's writings opposed to epigenesis.
"Lamarck, the Founder of Evolution" by Alpheus Spring Packard
THE BIOLOGICAL PROBLEM OF TO-DAY: Preformation or Epigenesis?
"In the Forbidden Land" by Arnold Henry Savage Landor
Development, by epigenesis or evolution?
"The World's Greatest Books - Volume 15 - Science" by Various
Epigenesis, 53 footnote, 58, 59.
"On Germinal Selection as a Source of Definite Variation" by August Weismann
Not long after Harvey's publication, Casper Frederick Wolf established the theory of epigenesis upon a firm foundation, where it still remains.
"Homo-culture" by Martin Luther Holbrook
Does it imply preformation or epigenesis?
"The Biological Problem of To-day" by Oscar Hertwig

In science:

Kauffman, Metabolic stability and epigenesis in randomly constructed genetic nets, J.
An efficient algorithm to generate large random uncorrelated Euclidean distances: the random link model
Cell tracking, genesis and epigenesis in an artificial organism.
Epigenetic Tracking, a Method to Generate Arbitrary Shapes By Using Evolutionary-Developmental Techniques
Metabolic stability and epigenesis in randomly constructed genetic nets.
Epigenetic Tracking, a Method to Generate Arbitrary Shapes By Using Evolutionary-Developmental Techniques
Metabolic stability and epigenesis in randomly connected genetic nets.
Damage Spreading in Spatial and Small-world Random Boolean Networks
Metabolic Stability and Epigenesis in Randomly Constructed Genetic Nets. J.
Field-control, phase-transitions, and life's emergence