ontogenetic
adjective
on·to·ge·net·ic ˌän-tə-jə-ˈne-tik 
1
: of, relating to, or appearing in the course of ontogeny
2
: based on visible morphological characters
ontogenetically
ˌän-tə-jə-ˈne-ti-k(ə-)lē
adverb 
Word History
Etymology
International Scientific Vocabulary
First Known Use
1869, in the meaning defined at sense 1
Medical Definition
ontogenetic
adjective
on·to·ge·net·ic -jə-ˈnet-ik
: of, relating to, or appearing in the course of ontogeny
ontogenetic variation