Definition of atopic adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈtɒpɪk//
; NAmE NAmE//ˈtɑːpɪk//
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relating to a form of allergy where there is a reaction in a part of the body that does not have direct contact with the thing causing the allergy Word Originearly 20th cent.: from Greek atopia ‘unusualness’, from atopos ‘unusual’, from a- ‘without’ + topos ‘place’.
See the Oxford Advanced American Dictionary entry: atopic