target cell

n.

A red blood cell having a dark center surrounded by a light band that is itself encircled by a darker ring, and occurring in certain anemias and after splenectomy.
A cell selectively affected by a particular agent, such as a virus, drug, or hormone.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.