isoimmunization

[ī′sō-ĭm′yə-nĭ-zāshən]
n.
  1. The development of specific antibodies as a result of antigenic stimulation using material derived from the red blood cells of another individual of the same species.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.