extreme sensitivity to an injected antigen, esp a protein, following a previous injection
Derived forms
anaphylactic (ˌanaphyˈlactic) or anaphylactoid (ˌanaphyˈlactoid)
adjective
anaphylactically (ˌanaphyˈlactically)
adverb
Word origin
C20: from ana- + (pro)phylaxis
anaphylaxis in American English
(ˌænəfəˈlæksɪs)
noun
a condition of hypersensitivity to proteins or other substances, requiring previousexposure to the allergenic substance and resulting in shock or other physical reactions
Derived forms
anaphylactic (ˌanaphyˈlactic) (ˌænəfəˈlæktɪk)
adjective
Word origin
ModL < Gr ana-, intens. + phylaxis, a guarding < phylassein, to guard