| 1. | Also called Wassermann antibody. an antibody formed in response to syphilis and reactive with cardiolipin in various blood tests for the disease. |
| 2. | an antibody found in certain human allergies, as hay fever and asthma. |
reagin re·a·gin (rē-ā'jĭn)
n.
An antibody found in the blood of individuals having a genetic predisposition to allergies such as asthma and hay fever.
A substance present in the blood of individuals having a positive serological test for syphilis.