noun Pharmacology.
an antibiotic, C 2 1 H 3 9 N 7 O 1 2 , produced by a soil actinomycete, Streptomyces griseus, and used in medicine in the form of its white, water-soluble sulfate salt, chiefly in the treatment of tuberculosis.

1944; < Neo-Latin Streptomyc(es) streptomyces + -in2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
streptomycin (ˌstrɛptəʊˈmaɪsɪn)
an antibiotic obtained from the bacterium Streptomyces griseus: used in the treatment of tuberculosis and Gram-negative bacterial infections. Formula: C21H39N7O12
[from Streptomyces, genus name of bacteria (from strepto- + Greek mukēs fungus + -in)]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

antibiotic drug, 1944, from Mod.L. Streptomyces, genus name of the soil bacterium from which the antibiotic was obtained, from Gk. streptos "twisted" + mykes "fungus." First isolated by U.S. microbiologist Selman Abraham Waksman (1888-1973).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

streptomycin strep·to·my·cin or strep·to·my·cin A (strěp'tə-mī'sĭn)
An antibiotic obtained from Streptomyces griseus and used against the tubercle bacillus and other 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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American Heritage
Science Dictionary
streptomycin   (strěp'tə-mī'sĭn)  Pronunciation Key 
An aminoglycoside antibiotic, C21H39O12N7, produced by the actinomycete Streptomyces griseus, given as an intramuscular injection to treat tuberculosis and other bacterial infections.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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