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superior mesenteric lymph node

n.
  1. Any of numerous nodes located in the mesentery along the superior mesenteric artery and its branches to the jejunum and the ileum, from which they receive lymph.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.