anaphylaxis

== English == === Etymology === Borrowed from French anaphylaxie, coined by French physiologist and parapsychologist Charles Richet and French zoologist Paul Portier from the Ancient Greek ᾰ̓νᾰ- (ănă-, “(intensifier) thoroughly”) from ᾰ̓νᾰ́ (ănắ, “to, again, upon”) and φύλαξις (phúlaxis, “protection, watching, guarding”). === Pronunciation === (General American) IPA(key): /ˌænəfɪˈlæksɪs/ === Noun === anaphylaxis (countable and uncountable, plural anaphylaxes) Extreme sensitivity to a substance such as a foreign protein or drug. A severe and rapid systemic allergic reaction to an allergen, causing a constriction of the trachea, preventing breathing; anaphylactic shock. ==== Hypernyms ==== hypersensitivity type I hypersensitivity ==== Derived terms ==== ==== Related terms ==== ==== Translations ====