kainogenesis

Noun

1.

kainogenesis - 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, kenogenesis

caenogenesis, cainogenesis, cenogenesis, development, growing, growth, kenogenesis, maturation, ontogenesis, ontogeny