asepsis

from WordNet (r) 3.0 (2006)

asepsis
    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}]

from The Collaborative International Dictionary of English v.0.48

Asepsis \A*sep"sis\, n. [NL., fr. Gr. ? priv. + sepsis.]
   State of being aseptic; the methods or processes of
   asepticizing.
   [Webster 1913 Suppl.]