coproantibody

[kŏp′rō-ăntĭ-bŏd′ē]
n.
  1. Any of various antibodies occurring in the intestinal tract and found in feces that are formed by plasma cells in the intestinal mucosa.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.