anaphylaxis

[ an-uh-fuh-lak-sis ]

/ ˌæn ə fəˈlæk sɪs /

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noun Pathology.

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

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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

Words nearby anaphylaxis

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

How to use anaphylaxis in a sentence

During randomized trials, no volunteers had severe allergic reactions, although people with a history of anaphylaxis were excluded from the trials.
Allergic reactions to the coronavirus vaccine are rare and outweighed by the benefit of protection, CDC finds|William Wan, Joel Achenbach|January 6, 2021|Washington Post
Seven of the people in the report had experienced anaphylaxis in the past.
Severe allergic reactions to COVID-19 vaccines are extremely rare, CDC says|Aimee Cunningham|January 6, 2021|Science News
Polyethylene glycol has been previously linked to a handful of anaphylaxis cases.
Everything to know about allergic reactions to COVID vaccines|Karen Yuan|December 31, 2020|Fortune
During the meeting, he and other Moderna executives explained that they saw no cases of anaphylaxis in their 30,000-person coronavirus vaccine trials.
FDA vows to move 'rapidly’ to authorize second coronavirus vaccine|Laurie McGinley, Carolyn Y. Johnson|December 18, 2020|Washington Post

Two cases of anaphylaxis occurred last week in the United Kingdom, involving health-care workers with a history of severe allergic reactions.
FDA investigating rare allergic reactions to Pfizer coronavirus vaccine, but says rollout will continue|Carolyn Y. Johnson, Joel Achenbach|December 18, 2020|Washington Post
Recent workers with pollens come near the truth in describing hay fever as an anaphylaxis.
The Treatment of Hay Fever|George Frederick Laidlaw
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
The anaphylaxis theory halts a little at this point and is not exactly clear about the mechanism of that first poisoning.
The Treatment of Hay Fever|George Frederick Laidlaw
He is in a state of exquisite anaphylaxis and a dose of pollen injected into his blood may kill him in twenty minutes.
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

British Dictionary definitions for anaphylaxis

anaphylaxis

/ (ˌænəfɪˈlæksɪs) /

noun

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

Medical 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

Other words from anaphylaxis

an′a•phy•lac′tic (-lăk′tĭk) adj.

Scientific definitions for anaphylaxis

anaphylaxis

[ ăn′ə-fə-lăk′sĭs ]

See anaphylactic shock.