knee jerk definition

  • noun:
    • A reflex contraction for the quadriceps muscle leading to an abrupt involuntary expansion for the knee, from a sharp faucet into the tendon underneath the patella; patellar response.
    • alternate spelling of knee-jerk.
    • mental and foreseeable; -- of particular people and their reactions to occasions.
    • a reflex extension for the knee resulting from a-sharp faucet on patellar tendon
  • adjective:
    • alternate spelling of knee-jerk.
  • others:
    • A jerk or forward kick for the reduced area of the knee generated by a blow or unexpected stress upon the patellar tendon associated with the leg, that causes a-sudden contraction associated with quadriceps muscle; the patellar reflex.

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