atopy

noun2

1. •
   A hereditary disorder marked by the tendency to develop localized immediate hypersensitivity reactions to allergens such as pollen, food etc and is manifested by hay fever, asthma, or similar allergic conditions; generally considered to be caused by the interaction of environmental and genetic factors.

   • Whatever factor is invoked to explain the increase in asthma must also be capable of explaining other outbreaks of atopy. — 1999
2. •
   A person suffering from atopic syndrome; a case of atopy.