polymyxin
noun
poly·myx·in
ˌpä-lē-ˈmik-sən 
: any of several toxic antibiotics obtained from a soil bacterium (Bacillus polymyxa) and active against gram-negative bacteria
Examples of polymyxin in a Sentence
Recent Examples on the Web
After 30 days of exposure, the bacteria could tolerate doses of polymyxin B that were 256 times higher than the original amount, but the SCUBs remained effective at the same dose.
—
Max G. Levy,
Wired,
30 Nov. 2021
Instead, antibiotics commonly used in flu vaccine manufacturing include neomycin, kanamycin, polymyxin B and gentamicin.
—
Anne P. Kim,
The Conversation,
13 Nov. 2020
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
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Max G. Levy,
Wired,
30 Nov. 2021
Instead, antibiotics commonly used in flu vaccine manufacturing include neomycin, kanamycin, polymyxin B and gentamicin.
—
Anne P. Kim,
The Conversation,
13 Nov. 2020
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
Cite this Entry
“Polymyxin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polymyxin. Accessed 6 Jul. 2026.
Copy CitationMedical Definition
polymyxin
noun
poly·myx·in
ˌpäl-i-ˈmik-sən
: any of several toxic antibiotics obtained from a soil bacterium (Paenibacillus polymyxa) and active against gram-negative bacteria
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