Entry 2 senses · 2 variants Webster, 1913 Anæsthetic /(ăn`ĕs*thĕt"ĭk)/ · An·æs·thet·ic · IPA a. n. 01 a. Capable of causing anesthesia; as, anæsthetic agents. 1. Capable of causing anesthesia; as, anæsthetic agents.(Med.) 02 n. A substance which produces anesthesia, as chloroform, ether, etc. 1. A substance which produces anesthesia, as chloroform, ether, etc.(Med.)