1. An automatic instinctive unlearned reaction to a stimulus
   "The doctor tested the patient's reflexes by tapping the knee";
   - reflex response, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction

1. (physiology) without volition or conscious control
   "a reflex knee jerk";
   - automatic, reflexive

Derived forms: reflexes

See also: involuntary

Type of: reaction, response

Encyclopedia: Reflex, pupillary