allergic

adj. pertaining to allergy; suffering from an allergy; susceptible

Allergy is an abnormal reaction to a substance foreign to the body that is acquired, predictable and rapid. In the strict sense of its meaning, it is the first (type 1) of five forms of hypersensitivity described by Gell and Coombs in their 1963 classification. However, by extension, the term "allergy" is often used for other abnormal reactions to substances. The term was coined by the Viennese pediatrician Clemens von Pirquet in 1906 after noting that some of his patients were hypersensitive to normally innocuous entities such as dust, pollen, or certain foods. Pirquet called this phenomenon "allergy", from the Greek words allos meaning "other" and ergon meaning "work".
See more at Wikipedia.org...

Adjective
1. characterized by or caused by allergy; "an allergic reaction"
(pertainym) allergy, allergic reaction
2. having an allergy or peculiar or excessive susceptibility (especially to a specific factor); "allergic children"; "hypersensitive to pollen"
(synonym) hypersensitive, hypersensitized, hypersensitised, sensitized, sensitised, supersensitive, supersensitized, supersensitised
(similar) susceptible

adjective
suffering from an allergy; she is allergic to cats; I'm allergic to penicillin; he showed an allergic reaction to chocolate
allergic agent = substance which produces an allergic reaction
allergic person = person who has an allergy to something
allergic reaction = effect (such as a skin rash or sneezing) produced by a substance to which a person has an allergy

تيز حسي , حساسي , الرجي