From anti- + sepsis.

antisepsis (uncountable)

1. (hygiene) The science and practice of countering microbial infection, as with the use of antiseptics, and the use of aseptic technique.
2. (archaic) Any antiseptic agent.
   • 1908, Columbia Photographic Society, Camera: a practical magazine for photographers, volume 12:

     Pastes made with ordinary wheat flour are very liable to mould and while this tendency may be counteracted by addition of chemical preservatives, there is danger that such antisepses may not be healthful for the print itself.

• French: antiseptique
• German: Antisepsis
• Portuguese: antissepsia
• Russian: антисе́птика