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steinberg thumb sign in Medicine

Steinberg thumb sign

(stīnbərg)
n.
  1. An indication of Marfan's syndrome in which the thumb projects well beyond the ulnar surface of the hand when it is held across the palm of the same hand.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.