The Collaborative International Dictionary of English v.0.48:

Antisepsis \An`ti*sep"sis\, n. [NL. See Anti-; Sepsis.]
   Prevention of sepsis by excluding or destroying
   microorganisms.
   [Webster 1913 Suppl.] Antiseptic

WordNet (r) 3.0 (2006):

antisepsis
    n 1: (of non-living objects) the state of being free of
         pathogenic organisms [syn: asepsis, antisepsis,
         sterility, sterileness]
    2: the process of inhibiting the growth and multiplication of
       microorganisms [syn: antisepsis, asepsis]