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Cabot's ring body

[kăb′əts]
n.
  1. A ring-shaped or figure-8 structure, staining red with Wright's stain, found in red blood cells in severe anemias.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.