reflex has definitions from the fields of biology,medicine,physiology
[ noun ] (biology,medicine) an automatic instinctive unlearned reaction to a stimulus

Used in print

(Rocky Mountains News, [Denver, Colorado],...)

`` I know when my reflexes are gone and I'm not going_to be any 25th man on the ball_club '' .

Suddenly my reflexes are gone .

(J. W. C. Hagstrom et al., "Debilitating muscular...)

At this time a detailed neuromuscular examination revealed diffuse muscle atrophy that was moderate in the hands and feet , but more marked in the shoulders , hips , and pelvic_girdle , with hypoactive deep tendon reflexes .

(E. Gellhorn, "Prolegomena to a theory of the emotions"...)

Similar effects can be induced reflexly via the baroreceptor reflexes in man and animals .

(John Hazard Wildman, "Take It Off," The Arizona...)

`` What is it '' ? asked the children , whose reflexes and replies were invariably so admirably normal and predictable .

[ adjective ] (physiology) without volition or conscious control


automatic reflexive


"the automatic shrinking of the pupils of the eye in strong light" "a reflex knee jerk" "sneezing is reflexive"

Related terms

physiology involuntary