[ an-uh-fuh-lak-sis ]
/ ˌæn ə fəˈlæk sɪs /

noun Pathology.

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

Origin of anaphylaxis

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

OTHER WORDS FROM anaphylaxis

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

Examples from the Web for anaphylactic

British Dictionary definitions for anaphylactic

/ (ˌænəfɪˈlæksɪs) /


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

Derived forms of anaphylaxis

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 anaphylactic

[ ăn′ə-fə-lăksĭs ]

n. pl. an•a•phy•lax•es (-lăksēz)

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

Other words from anaphylaxis

an′a•phy•lactic (-lăktĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for anaphylactic

[ ăn′ə-fə-lăksĭs ]

See anaphylactic shock.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.