1. 
[syn: aseptic, sterile]
The Collaborative International Dictionary of English v.0.48:
Aseptic \A*sep"tic\, a. [Pref. a- not + septic.]
   1. Not liable to putrefaction; nonputrescent.
      [1913 Webster]
   2. free from pathogenic microorganisms; sterile; as, aseptic
      operating conditions.
      [PJC]
   3. [metaphorical] lacking emotion, human warmth, or
      excitement.
      [PJC]
The Collaborative International Dictionary of English v.0.48:
Aseptic \A*sep"tic\, n.
   An aseptic substance.
   [1913 Webster]
WordNet (r) 3.0 (2006):
aseptic
    adj 1: free of or using methods to keep free of pathological
           microorganisms; "a sterile operating area"; "aseptic
           surgical instruments"; "aseptic surgical techniques"
           [syn: aseptic, sterile]