[Gk. anti, against, septikos, putrefying.] Substances which act to prevent decay or putrefaction of organic materials. Among the many antiseptics may be named sugar, alcohol, carbolic acid, charcoal, nitre, alum, and chloride of zinc. They are used for the preservation of food substances. Cold has a powerful antiseptic action, and cold storage is one of the best and cheapest of food preservers. Antiseptic surgery or Listerism is a mode of treating surgical wounds, introduced by Sir Joseph Lister. In this the wound and the instruments are treated with carbolic acid or other antiseptics to prevent dangerous germs from entering. This has proved wonderfully successful, and has enabled surgeons to perform operations successfully which would have led to certain death under the old system of treatment.