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Noun: anaphylactic shock  ,a-nu-fu'lak-tik shók
  1. A severe and rapid and sometimes fatal hypersensitivity reaction to a substance (especially a vaccine, penicillin, shellfish or insect venom) to which the organism has become sensitized by previous exposure

Derived forms: anaphylactic shocks

Type of: anaphylaxis

Encyclopedia: Anaphylactic shock