c. 1600, "of or pertaining to natural science" (a sense now obsolete), from physiology + -ical. From 1814 as "of or pertaining to physiology, relating to the functions and properties of living bodies." Related: Physiologically.
Pavlov's physiological theories
physiological psychology
physiological processes
physicochemical
physicological
physics
physio-
physiognomy
physiological
physiology
physiotherapy
physique
-phyte
phyto-