neo·​my·​cin ˌnē-ə-ˈmī-sᵊn How to pronounce neomycin (audio)
: 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 The foreign bodies were removed from the nasal region of the right cornea using Jewelers forceps, and the patient was prescribed a combination neomycin, polymyxin B, and dexamethasone ointment (Maxitrol(®)), given 4 times per day. Seriously Science, Discover Magazine, 23 Oct. 2013 The antibiotics facing export limits are tinidazole, metronidazole, chloramphenicol, erythromycin salts, neomycin, clindamycin salts and ornidazole. Vindu Goel, New York Times, 10 Mar. 2020 Serious allergic reactions are extremely rare but have been experienced by patients allergic to the antibiotic neomycin. Henry Goldman | Bloomberg, Washington Post, 5 May 2019 The vaccine is not recommended for people who allergic to gelatin, the antibiotic neomycin, or any other vaccine components., 1 May 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'neomycin.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


neo- + -mycin

First Known Use

1949, in the meaning defined above

Time Traveler
The first known use of neomycin was in 1949

Dictionary Entries Near neomycin

Cite this Entry

“Neomycin.” Dictionary, Merriam-Webster, Accessed 27 Feb. 2024.

Medical Definition


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