noun Pathology.

  1. exaggerated allergic reaction to a foreign protein resulting from previous exposure to it.


  1. extreme sensitivity to an injected antigen, esp a protein, following a previous injection

see anaphylactic.

n. pl. an•a•phy•lax•es (-lăksēz)

  1. Hypersensitivity induced by preliminary exposure to a substance and usually producing a contraction of smooth muscle and a dilation of blood vessels.
  2. anaphylactic shock

  1. See anaphylactic shock.

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