Source : Webster's Revised Unabridged Dictionary (1913)

Physiophyly \Phys`i*oph"y*ly\, n. [Gr. fy`sis nature + ? a
   clan.] (Biol.)
   The tribal history of the functions, or the history of the
   paleontological development of vital activities, -- being a
   branch of phylogeny. See {Morphophyly}. --Haeckel.