Antimicrobial- An agent that kills microorganisms or suppresses their growth and multiplication Antiseptic-A substance that inhibits the growth and development of microorganisms without necessarily killing them. Antiseptics are usually applied to body surfaces. Biocide -a general term for any agent that kills organis ms Chemical germicide -A chemical or a mixture of chemicals used to kill micro-organisms.Antimicrobial – An agent that kills microorganisms or suppresses their growth and multiplication. Antiseptic – A substance that inhibits the growth and development of microorganisms without necessarily killing them. Antiseptics are usually applied to body surfaces. Biocide – A general term for any agent that kills organis ms. Chemical germicide – A chemical or a mixture of chemicals used to kill micro-organisms