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Noun: knee jerk  nee-jurk
  1. A reflex extension of the leg resulting from a sharp tap on the patellar tendon
    - knee-jerk reflex, patellar reflex

Derived forms: knee jerks

Type of: inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex

Encyclopedia: Knee jerk