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knee-jerk reflex

DEFINITIONS OF: knee-jerk reflex

1

n a reflex extension of the leg resulting from a sharp tap on the patellar tendon

Synonyms:
knee jerk, patellar reflex
Type of:
inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex
an automatic instinctive unlearned reaction to a stimulus
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