kernig's sign

Medical Dictionary

Kernig's sign Ker·nig's sign (kûr'nĭgz)
n.
An indication of meningitis in which complete extension of the leg on the thigh is impossible when the individual lies on the back and flexes the thigh at a right angle to the axis of the trunk.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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WordNet
kernig's sign

noun
symptom of meningitis; patient cannot extend the leg at the knee when the thigh is flexed because of stiffness in the hamstrings 
WordNet® 3.0, © 2006 by Princeton University.
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