neo·​my·​cin | \ ˌnē-ə-ˈmī-sᵊn How to pronounce neomycin (audio) \

Definition of neomycin

: a broad-spectrum highly toxic antibiotic or mixture of antibiotics produced by a streptomyces (Streptomyces fradiae) and used medically especially to treat local infections

Examples of neomycin in a Sentence

Recent Examples on the Web Serious allergic reactions are extremely rare but have been experienced by patients allergic to the antibiotic neomycin. Henry Goldman | Bloomberg, Washington Post, "How Measles Made a Comeback After Elimination in U.S.," 5 May 2019 The vaccine is not recommended for people who allergic to gelatin, the antibiotic neomycin, or any other vaccine components., "What Is Shingles?," 1 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'neomycin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of neomycin

1949, in the meaning defined above

History and Etymology for neomycin

neo- + -mycin

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The first known use of neomycin was in 1949

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Cite this Entry

“Neomycin.” The Dictionary, Merriam-Webster Inc., Accessed 21 January 2020.

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neo·​my·​cin | \ ˌnē-ə-ˈmīs-ᵊn How to pronounce neomycin (audio) \

Medical Definition of neomycin

: a broad-spectrum highly toxic mixture of aminoglycoside antibiotics produced by a bacterium of the genus Streptomyces (S. fradiae) specifically : a commercial preparation that is composed chiefly of two stereoisomers of neomycin administered in the form of their sulfate C23H46N6O13·2¹/₂H2SO4 and that is used either alone or in combination with one or more other drugs especially to treat infections (as impetigo or conjunctivitis) topically, to irrigate the bladder, and to produce intestinal antisepsis prior to certain surgeries

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