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Noun: reflex  'ree,fleks
  1. An automatic instinctive unlearned reaction to a stimulus
    - reflex response, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reaction
Adjective: reflex  'ree,fleks
  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