Allergies, also known as allergic diseases, are a number of conditions caused by ...... phenomenon "allergy" from the Ancient Greek words ἄλλος allos meaning ...
Define allergy: altered bodily reactivity (such as hypersensitivity) to an antigen in response to a first exposure — allergy in a sentence.
Allergy definition, an abnormal reaction of the body to a previously encountered allergen introduced by inhalation, ingestion, injection, or skin contact, often ...
Read medical definition of Allergy. ... Allergy: A misguided reaction to foreign substances by the immune system, the body system of defense against foreign ...
AAAAI experts explain an allergy is a reaction to an allergen.
Definition of allergy - a damaging immune response by the body to a substance, especially a particular food, pollen, fur, or dust, to which it has become.
Hypersensitivity caused by exposure to a particular antigen (allergen) resulting in a marked increase in reactivity to that antigen on subsequent exposure, ...
allergy definition, meaning, what is allergy: a condition that makes a person become sick or develop skin or breathing problems because…. Learn more.
Nov 22, 2016 ... Allergies occur when your immune system reacts to a foreign substance — such as pollen, bee venom or pet dander — or to a food that doesn't ...