thymic corpuscle

n.
  1. Any of numerous small spherical bodies found in the medulla of the lobules of the thymus, composed of keratinized, usually squamous, epithelial cells arranged around clusters of degenerating lymphocytes, eosinophils, and macrophages.Hassall's concentric corpuscle
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.