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hallux rigidus

(rĭjĭ-dəs)
n.
  1. A condition in which there is stiffness in the metatarsophalangeal joint of the big toe.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.