Noun
an allergic reaction that becomes apparent in a sensitized person only minutes after contact
Source: WordNetAs partly reported previously, an increased prevalence of atopy in adult age significantly associated with the dog being from an allergy prone breed, its mother having a history of atopy, and more than 50 % of the dog's hair coat being white. Source: Internet
"Links between Pollen, Atopy and the Asthma Epidemic" International Archives of Allergy and Immunology ;144:162–170 These high pollen counts have led to difficulties for some track athletes who compete in Eugene. Source: Internet