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1. Highly or excessively sensitive.
2. Responding excessively to the stimulus of a foreign agent, such as an allergen.
hy′per·sen′si·tive·ness, hy′per·sen′si·tiv′i·ty n.
hy′per·sen′si·tize′ (-tīz′) v.
(Photography) (tr) to treat (a photographic emulsion), usually after manufacture and shortly before exposure, to increase its speed
ˌhyperˌsensitiˈzation, ˌhyperˌsensitiˈsation n
Past participle: hypersensitized