cenogenesis

Definitions of cenogenesis

1. noun

   introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution)
   synonyms: caenogenesis, cainogenesis, kainogenesis, kenogenesis

   antonyms:

   palingenesis

   emergence during embryonic development of various characters or structures that appeared during the evolutionary history of the strain or species

   type of:

   development, growing, growth, maturation, ontogenesis, ontogeny

   (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level