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[ih-rith-ruh-mahy-sin] /ɪˌrɪθ rəˈmaɪ sɪn/
Pharmacology. an antibiotic, C 37 H 67 NO 13 , produced by an actinomycete, Streptomyces erythraeus, used chiefly in the treatment of diseases caused by many Gram-positive and some Gram-negative organisms.
1950-55; erythro- + -mycin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for erythromycin
  • Adding erythromycin to the treatment regimen may help remove these fragments.
  • If started early enough, antibiotics such as erythromycin can make the symptoms go away more quickly.
  • Safe antibiotics include penicillin and its derivatives, erythromycin and the cephalosporins.
British Dictionary definitions for erythromycin


an antibiotic used in treating certain infections,sometimes as an alternative to penicillin. It is obtained from the bacterium Streptomyces erythreus. Formula: C37M67NO13
Word Origin
C20: from erythro- + Greek mukēs fungus + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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erythromycin in Medicine

erythromycin e·ryth·ro·my·cin (ĭ-rĭth'rə-mī'sĭn)
An antibiotic obtained from a strain of Streptomyces erythreus, effective against many gram-positive bacteria and some gram-negative bacteria.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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erythromycin in Science
An antibiotic obtained from the bacteria Streptomyces erythreus, effective against many gram-positive bacteria and some gram-negative bacteria.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for erythromycin

drug synthesized by the soil bacterium Streptomyces erythraeus and used in the treatment of throat infections, pneumonia, and other diseases. Erythromycin, an antibiotic that inhibits the synthesis of vital proteins in susceptible bacteria, may be either bacteriostatic (i.e., inhibiting bacterial reproduction but not killing bacterial cells) or bactericidal (i.e., killing bacteria by direct action), depending on its concentration and the type of microorganism against which it is used. Among the disease-causing agents susceptible to erythromycin are Staphylococcus aureus, several species of Streptococcus, Mycoplasma species, Legionella pneumophila (the bacterium that causes Legionnaire disease), and Corynebacterium diphtheriae (the causative agent of diphtheria).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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