HyperDic: knee_jerk

English > 1 sense of the expression knee jerk:
NOUNactknee jerk, knee-jerk reflex, patellar reflexa reflex extension of the leg resulting from a sharp tap on the patellar tendon
English > knee jerk: 1 sense > noun 1, act
MeaningA reflex extension of the leg resulting from a sharp tap on the patellar tendon.
Synonymsknee-jerk reflex, patellar reflex
Broaderreflex, reflex response, reflex action, instinctive reflex, innate reflex, inborn reflex, unconditioned reflex, physiological reactionAn automatic instinctive unlearned reaction to a stimulus

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