blocking antibody

noun
  1. Immunology. an antibody that partly combines with an antigen and interferes with cell-mediated immunity, thereby preventing an allergic reaction.
Also called blocking factor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

blocking antibody in Medicine

blocking antibody

n.
  1. An antibody that combines with an antigen without a reaction but that blocks another antibody from later combining with that antigen.
  2. An immunoglobulin that combines specifically with an atopic allergen but does not elicit an allergic reaction.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.