Immunoglobulin E

In biology, Immunoglobulin E (IgE) is a class of antibody (or immunoglobulin "isotype") that has only been found in mammals. It plays an important role in allergy, and is especially associated with type 1 hypersensitivity. IgE has also been implicated in immune system responses to most parasitic worms like Schistosoma mansoni, Trichinella spiralis, and Fasciola hepatica, and may be important during immune defense against certain protozoan parasites such as Plasmodium falciparum.
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Immunoglobulin E n. Abbr. IgE The class of antibodies produced in the lungs, skin, and mucous membranes and responsible for allergic reactions. [more]Immunoglobulin E - Community and Resources

Noun
1. one of the five major classes of immunoglobulins; present primarily in the skin and mucous membranes
(synonym) IgE
(hypernym) immunoglobulin, Ig, immune serum globulin, immune gamma globulin, immune globulin
(hyponym) reagin

Antibody of a specific class used to fight invading allergic substances (allergens). An allergic person frequently has elevated blood levels of IgE. IgE antibodies attack and engage the invading army of allergens.