The Collaborative International Dictionary of English v.0.48:

Physiogeny \Phys`i*og"e*ny\ (f[i^]z`[i^]*[o^]j"[-e]*n[y^]), n.
   [Gr. fy`sis nature + root of gi`gnesqai to be born.] (Biol.)
   The germ history of the functions, or the history of the
   development of vital activities, in the individual, being one
   of the branches of ontogeny. See Morphogeny. --Haeckel.
   [1913 Webster]