GLOSSARY: Antibiotic

An Antibiotic is defined as an organic substance of microbial origin (usually mold or actinomycete bacteria) that is either toxic or growth inhibiting for other organisms. Also with the advent of synthetic methods of production, a substance produced by a microorganism or a similar substance (produced wholly or partly by chemical synthesis) which, in low concentrations, inhibits the growth of other microorganisms. Penicillin, tetracycline, and erythromycin are examples of antibiotics.