re·a·gin (r -  j n)n. 1. An antibody found in the blood of individuals having a genetic predisposition to allergies such as asthma and hay fever. 2. A substance present in the blood of individuals having a positive serological test for syphilis. re  a·ginic (r -jnk) adj.re a·gini·cal·ly adv. |
reagin [ˈrɪədʒɪn]
n
(Life Sciences & Allied Applications / Biochemistry) Immunol a type of antibody that is formed against an allergen and is attached to the cells of a tissue. The antigen-antibody reaction that occurs on subsequent contact with the allergen causes tissue damage, leading to the release of histamine and other substances responsible for an allergic reaction
[from German reagieren to react + -in]
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | reagin - an immunoglobulin E that is formed as an antibody against allergens (such as pollen); attaches to cell membranes causing the release of histamine and other substances responsible for the local inflammation characteristic of an allergy IgE, immunoglobulin E - one of the five major classes of immunoglobulins; present primarily in the skin and mucous membranes |
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