1) Caenogenesis 2) Cainogenesis 3) Development 4) Growing 5) Growth 6) Kainogenesis 7) Kenogenesis 8) Maturation 9) Ontogenesis 10) Ontogeny 1) Caenogenesis 2) Cainogenesis 3) Kainogenesis 4) Kenogenesis 
[n] - 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)
caenogenesis, cenogenesis 1. Embryonic development in which the appearance of new features occurs as an adaptive response to environmental conditions. 2. The development by an embryo, fetus, or larva of organs or body parts that are lost in adult life.
kenogenesis 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)