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allergy
1
: altered bodily reactivity (as hypersensitivity) to an antigen in response to a first exposure <a bee venom allergy so severe that a second sting may be fatal>
2
: exaggerated or pathological immunological reaction (as by sneezing, difficult breathing, itching, or skin rashes) to substances, situations, or physical states that are without comparable effect on the average individual
3
: medical practice concerned with allergies
4
: a feeling of antipathy or aversion
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