Dictionarydem•e•clo•cy•clinePronunciation: (dem"u-klō-sī'klēn), [key] —n. Pharm. a broad-spectrum antibiotic, C21H21ClN2O8, derived from a mutant strain of the bacterium Streptomyces aureofaciens: used against a wide range of susceptible microorganisms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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