kenogenesis
1.
(
noun
) introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (as addition of the placenta in mammalian evolution)
Synonyms:
caenogenesis
,
cainogenesis
,
cenogenesis
,
kainogenesis
Related Words:
development
,
growing
,
growth
,
maturation
,
ontogenesis
,
ontogeny
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