Definition of anaphylaxis noun from the Oxford Advanced American Dictionary

 

anaphylaxis

 noun
noun
NAmE//ˌænəfəˈlæksəs//
 
[uncountable, countable](pl. anaphylaxes
NAmE//‑ˈlæksiz//
 
)
(medical)
 
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an extreme allergic reaction to something that you eat or touch
anaphylactic
 
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NAmE//ˌænəfəˈlæktɪk//
 
adjective anaphylactic shock
See the Oxford Advanced Learner's Dictionary entry: anaphylaxis