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epi·gen·e·sis | \ ˌe-pə-ˈje-nə-səs 
\
\Definition of epigenesis
1 : development of a plant or animal from an egg or spore through a series of processes in which unorganized cell masses differentiate into organs and organ systems also : the theory that plant and animal development proceeds in this way — compare preformation sense 2
2 : change in the mineral character of a rock owing to outside influences
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More Definitions for epigenesis
epigenesis
nounepi·gen·e·sis | \ ˌep-ə-ˈjen-ə-səs \
\ plural epigeneses\ -ˌsēz \
\Medical Definition of epigenesis
1 : development involving gradual diversification and differentiation of an initially undifferentiated entity (as a zygote or spore) — compare preformation
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Time Traveler for epigenesis
The first known use of epigenesis was in 1798
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