neomycin
noun
neo·my·cin ˌnē-ə-ˈmī-sᵊn 
: a broad-spectrum highly toxic antibiotic or mixture of antibiotics produced by a streptomyces (Streptomyces fradiae) and used medically especially to treat local infections
Example Sentences
Recent Examples on the Web 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. Health.com, 1 May 2017
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. Health.com, 1 May 2017 Word History
Etymology
neo- + -mycin
First Known Use
1949, in the meaning defined above
Medical Definition
neomycin
noun
neo·my·cin ˌnē-ə-ˈmīs-ᵊn
: 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