Source : Webster's Revised Unabridged Dictionary (1913)

Physiological \Phys`i*o*log"ic*al\, a.
   Of or pertaining to physiology; relating to the science of
   the functions of living organism; as, physiological botany or
   chemistry.

Source : WordNet®

physiological
     adj 1: of or relating to the biological study of physiology;
            "physiological psychology"; "Pavlov's physiological
            theories"
     2: of or consistent with an organism's normal functioning;
        "physiologic functions"; "physiological processes" [syn: {physiologic}]