epigenesis

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epigenesis

 [ep″ĭ-jen´ĕ-sis]
the development of an organism from an undifferentiated cell, consisting in the successive formation and development of organs and parts that do not preexist in the zygote. adj., adj epigenet´ic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ep·i·gen·e·sis

(ep'i-jen'ĕ-sis),
1. Development of offspring from a zygote. Compare: preformation theory.
2. Regulation of the expression of gene activity without alteration of genetic structure.
[epi- + G. genesis, creation]
Farlex Partner Medical Dictionary © Farlex 2012

epigenesis

(ĕp′ə-jĕn′ĭ-sĭs)
n.
1. 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.
2. Geology Change in the mineral content of a rock because of outside influences.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ep·i·gen·e·sis

(ep'i-jen'ĕ-sis)
1. Development of offspring from a zygote.
2. Regulation of the expression of gene activity without alteration of genetic structure.
[epi- + G. genesis, creation]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

epigenesis

the formation of entirely new structures during the development of the EMBRYO.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005