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anaphylaxis

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Anaphlaxis
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an⋅a⋅phy⋅lax⋅is

  [an-uh-fuh-lak-sis]
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–noun Pathology.
exaggerated allergic reaction to a foreign protein resulting from previous exposure to it.
Origin:
1905–10; ana- + (pro)phylaxis

Related forms:
an⋅a⋅phy⋅lac⋅tic  [an-uh-fuh-lak-tik] , adjective
an⋅a⋅phy⋅lac⋅ti⋅cal⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Anaphlaxis
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anaphylactic shock  
n.  A sudden, severe allergic reaction characterized by a sharp drop in blood pressure, urticaria, and breathing difficulties that is caused by exposure to a foreign substance, such as a drug or bee venom, after a preliminary or sensitizing exposure. The reaction may be fatal if emergency treatment, including epinephrine injections, is not given immediately. Also called anaphylaxis.
an·a·phy·lax·is   (ān'ə-fə-lāk'sĭs)   
n.  

  1. Hypersensitivity especially in animals to a substance, such as foreign protein or a drug, that is caused by exposure to a foreign substance after a preliminary exposure.

  2. See anaphylactic shock.


[ana- + (pro)phylaxis.]
an'a·phy·lac'tic (-lāk'tĭk), an'a·phy·lac'toid (-toid) adj., an'a·phy·lac'ti·cal·ly adv.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: ana·phy·lax·is
Pronunciation: "an-&-f&-'lak-s&s
Function: noun
Inflected Form: plural ana·phy·lax·es /-"sEz/
1 : hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with thecausative agent
2 : ANAPHYLACTIC SHOCK
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

anaphylaxis an·a·phy·lax·is (ān'ə-fə-lāk'sĭs)
n. pl. an·a·phy·lax·es (-lāk'sēz)

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

  2. See anaphylactic shock.

an'a·phy·lac'tic (-lāk'tĭk) adj.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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