The spelling of the word "apothesine" can be explained through the International Phonetic Alphabet (IPA). Its pronunciation is /əˈpɒθɪsiːn/, where the stress falls on the second syllable. The "a" is pronounced as "uh," the "o" as "ah," and the "e" as "ee." The "th" sound is represented by the Greek letter theta. This spelling can cause confusion due to the similarity to the word "anesthetic," which is also often spelled "anaesthetic" in British English.
Trade name of the cinnamic ester of gamma-diethylamino-propylalcohol hydrochloride, occurring in the form of snow-white crystals, soluble in alcohol and in water; recommended for use as a local anesthetic.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.