knee-jerk reflex


A sudden involuntary forward movement of the lower leg that can be produced by a firm tap to the tendon located just below the kneecap.

Notes for knee-jerk reflex

The term is loosely applied to any response or belief that is automatic rather than thoughtful. In this sense, it is usually a term of reproach: “Smith is a knee-jerk liberal.”

Words Nearby knee-jerk reflex

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.