anaphylaxis

[ an-uh-fuh-lak-sis ]

/ ˌæn ə fəˈlæk sɪs /

noun Pathology.

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

Nearby words

anaphylactogenesis, anaphylactoid, anaphylactoid purpura, anaphylactoid shock, anaphylatoxin, anaphylaxis, anaplasia, anaplasmosis, anaplastic, anaplastic cell, anaplasty

Origin of anaphylaxis

First recorded in 1905–10; ana- + (pro)phylaxis

Related forms

an·a·phy·lac·tic

[an-uh-fuh-lak-tik] /ˌæn ə fəˈlæk tɪk/, adjectivean·a·phy·lac·ti·cal·ly, adverban·ti·an·a·phy·lac·tic, adjective, nounpseu·do·an·a·phy·lac·tic, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for anaphylaxis

Recent workers with pollens come near the truth in describing hay fever as an anaphylaxis.
The Treatment of Hay Fever|George Frederick Laidlaw
What if gout should prove to be a sensitization or anaphylaxis to uric acid that does not exist in the non-gouty?
The Treatment of Hay Fever|George Frederick Laidlaw
Viewed in this light the development of immunity to insect bites assumes a place in the larger problem of anaphylaxis.
Handbook of Medical Entomology|William Albert Riley
Foreign protein sensitization or anaphylaxis was the basis of Dr. Rutledge's coup.
The Sword and the Atopen|Taylor H. Greenfield

The inherited form of hay fever is explained by the well-known transmission of anaphylaxis to the offspring.
The Treatment of Hay Fever|George Frederick Laidlaw

British Dictionary definitions for anaphylaxis

anaphylaxis

/ (ˌænəfɪˈlæksɪs) /

noun

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

Derived Forms

anaphylactic or anaphylactoid, adjectiveanaphylactically, adverb

Word Origin for anaphylaxis

C20: from ana- + (pro) phylaxis

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for anaphylaxis

anaphylaxis

[ ăn′ə-fə-lăk′sĭs ]

n. pl. an•a•phy•lax•es (-lăk′sēz)

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

anaphylactic shock

Related forms

an′a•phy•lac′tic (-lăk′tĭk) adj.

Science definitions for anaphylaxis

anaphylaxis

[ ăn′ə-fə-lăk′sĭs ]

See anaphylactic shock.