Origin of atopy
Greek atopia uncommonness, from atopos out of the way, uncommon, from a- + topos place
First Known Use: 1923
Medical Definition of atopy
: a genetic disposition to develop an allergic reaction (as allergic rhinitis, asthma, or atopic dermatitis) and produce elevated levels of IgE upon exposure to an environmental antigen and especially one inhaled or ingested
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