Atopy

A tendency to be "hyperallergic". Atopic responses appear after the body is exposed to various allergens, for example pollen, dander, dust mites, certain foods, or chemical/physical irritants.

PubMed Health Glossary
(Source: Wikipedia)

Terms to know

Allergens
A substance that causes an allergic response. Examples include pollen, molds, and certain foods....
Allergies
Conditions caused by hypersensitivity of the immune system to something in the environment that usually cause...
Antigens
A foreign substance that triggers the production of antibodies when it is introduced into the body....

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