Source : Webster's Revised Unabridged Dictionary (1913)

Ontogenetic \On`to*ge*net"ic\, a. (Biol.)
   Of or pertaining to ontogenesis; as, ontogenetic phenomena.
   -- {On`to*ge*net"ic*al*ly}, adv.

Source : WordNet®

ontogenetic
     adj : of or relating to the origin and development of individual
           organisms; "ontogenetic development"