ectoantigen

[ĕk′tō-ăntĭ-jən]

n.

A toxin or other inducer of antibody formation, separate or separable from its source.exoantigen

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.