Etymology
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allergic (adj.)

1911, from allergy (q.v.) + -ic; perhaps modeled on French allergique (1906). Figurative use, "antipathetic, repulsed" is from 1936.

updated on December 20, 2016

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Definitions of allergic from WordNet

allergic (adj.)
characterized by or caused by allergy;
an allergic reaction
allergic (adj.)
having an allergy or peculiar or excessive susceptibility (especially to a specific factor);
allergic children
Synonyms: hypersensitive / hypersensitized / hypersensitised / sensitized / sensitised / supersensitive / supersensitized / supersensitised
From wordnet.princeton.edu, not affiliated with etymonline.