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Antibiotic

Antimicrobial substance active against bacteria

An antibiotic is a type of antimicrobial substance which is active against bacteria. It is the most important type of antibacterial agent for fighting bacterial infections, and antibiotic medications are widely used in the treatment and prevention of such infections. They may either kill or inhibit the growth of bacteria. A limited number of antibiotics also possess antiprotozoal activity, but antibiotics are not effective against viruses or fungi.

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antibiotic · noun — Any substance that can destroy or inhibit the growth of bacteria and similar microorganisms, generally transported by the lymphatic system.

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