ontogeny noun. 
[ɒn'tɒdʒǝni] L19.[from ONTO- + -GENY.]1.  Biology. The origin and development of the individual organism; ontogenesis. 
L19.■ J. B. Watson The recapitulation theory..holds..that ontogeny repeats phylogeny.2.  The branch of science that deals with ontogenesis. 
L19. ■   onto'genic adjective = 
ONTOGENETIC L19. ■   onto'genically adverb L19. ■   ontogenist noun L19.  [TahlilGaran] English Dictionary ▲