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Shenton's line

[shĕn′tənz]
n.
  1. A curved line formed by the top of the obturator foramen and the inner side of the neck of the femur, seen in a radiograph of the normal hip joint.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.