Entry 1 sense Webster, 1913 anaphylactic /(ăn`ȧ*fī*lăk"tĭk or ăn`ȧ*fĭ*lăk"tĭk)/ · IPA 01 n. Of or pertaining to anaphylaxis; caused by anaphylaxis. 1. Of or pertaining to anaphylaxis; caused by anaphylaxis.(Med.)