designating or of any of various allergic conditions, including a type of dermatitis and a type of asthma, that are thought to be inherited
See atopic in American Heritage Dictionary 4
(ā-tŏpˈĭk)
adjective
Of, relating to, or caused by a hereditary predisposition toward developing certain hypersensitivity reactions, such as hay fever, asthma, or chronic urticaria, upon exposure to specific antigens: atopic dermatitis.