common variable immunodeficiency

n.

Immunodeficiency of unknown cause characterized chiefly by abnormally low levels of immunoglobulin; it is associated with increased susceptibility to pyogenic infections and with autoimmune disease.

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