Source : Webster's Revised Unabridged Dictionary (1913)

Cormogeny \Cor*mog"e*ny\ (k[^o]r*m[o^]j"[-e]*n[y^]), n. [Gr.
   kormo`s trunk of a tree + root of gi`gnesqai to be born.]
   (Biol.)
   The embryological history of groups or families of
   individuals.