Asepsis is the state of being free from disease-causing microorganisms (bacteria, viruses, fungi, parasites) or preventing contact with micro-organisms in living tissues and surgical fields. Antisepsis is the process of applying chemical agents to living tissues to inhibit or kill microbes, sterilization is the complete destruction of all microbial life (including spores) on inanimate objects, and disinfection destroys vegetative pathogens on inanimate surfaces.
जीवित ऊतकों और शल्य क्षेत्र में रोगजनक रोगाणुओं की पूर्ण अनुपस्थिति को एसेप्सिस (Asepsis / रोगाणुहीनता) कहा जाता है।