Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

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