n.
Pronunciation: - ' lak-s ə s
Function: noun
Inflected Form: plural -lax · es \ - ˌ s ē z \
Etymology: New Latin, from ana- + pro phylaxis
Date: 1907
1 : hypersensitivity (as to foreign proteins or drugs) resulting from sensitization following prior contact with the causative agent
2 : ANAPHYLACTIC SHOCK