antizymotic,a.andn.Med.|ˌæntɪzɪˈmɒtɪk, -zaɪˈmɒtɪk| [f. anti- 3 + Gr. ζῡµωτικ-ός causing fermentation.] A.adj.=prec.B.n. A substance that prevents fermentation or decomposition. 1875H. Wood Therap. (1879) 622 Antizymotics are used for the purpose of preventing decomposition.