cephalosporin
noun
ceph·a·lo·spo·rin
ˌse-fə-lə-ˈspȯr-ən 
: any of several antibiotics produced by an imperfect fungus (genus Acremonium synonym Cephalosporium)
Examples of cephalosporin in a Sentence
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All three cases had a distinct genetic mutation that made the bacteria resistant to yet another class of antibiotics, the cephalosporins, which are often used to treat Shigella infections when other drugs fail.
—
Corinne Purtill, Los Angeles Times, 18 Dec. 2024
This interaction is most noticeable with a group of antibiotics called cephalosporins, which include Keflex (cephalexin) and Omnicef (cefdinir).
—Kirstyn Hill, Pharmd, Mph, Health, 8 Dec. 2024
In general, penicillins and cephalosporins are considered safe during pregnancy.
—Erika Prouty, Verywell Health, 4 Oct. 2024
Examples of interacting antibiotics include quinolones (such as ciprofloxacin), tetracyclines, and cephalosporins (like Keflex).
—Kirstyn Hill, Pharmd, Mph, Health, 22 Sep. 2024
The cephalosporin ceftriaxone is the last drug standing in the US to treat gonorrhea infections.
—Beth Mole, Ars Technica, 28 Mar. 2024
In 2010, the CDC updated the treatment again, recommending that doctors combine cephalosporins with one of two other types of antibiotics—azithromycin or doxycycline—to try to thwart the development of resistance.
—Beth Mole, Ars Technica, 28 Mar. 2024
Resistance rising By 2007, the agency switched to cephalosporins, including cefixime.
—Beth Mole, Ars Technica, 28 Mar. 2024
When taken with cephalosporin antibiotics, the body’s ability to absorb vitamin K is reduced.
—Allison Futterman, Discover Magazine, 16 Feb. 2024
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Corinne Purtill, Los Angeles Times, 18 Dec. 2024
This interaction is most noticeable with a group of antibiotics called cephalosporins, which include Keflex (cephalexin) and Omnicef (cefdinir).
—Kirstyn Hill, Pharmd, Mph, Health, 8 Dec. 2024
In general, penicillins and cephalosporins are considered safe during pregnancy.
—Erika Prouty, Verywell Health, 4 Oct. 2024
Examples of interacting antibiotics include quinolones (such as ciprofloxacin), tetracyclines, and cephalosporins (like Keflex).
—Kirstyn Hill, Pharmd, Mph, Health, 22 Sep. 2024
The cephalosporin ceftriaxone is the last drug standing in the US to treat gonorrhea infections.
—Beth Mole, Ars Technica, 28 Mar. 2024
In 2010, the CDC updated the treatment again, recommending that doctors combine cephalosporins with one of two other types of antibiotics—azithromycin or doxycycline—to try to thwart the development of resistance.
—Beth Mole, Ars Technica, 28 Mar. 2024
Resistance rising By 2007, the agency switched to cephalosporins, including cefixime.
—Beth Mole, Ars Technica, 28 Mar. 2024
When taken with cephalosporin antibiotics, the body’s ability to absorb vitamin K is reduced.
—Allison Futterman, Discover Magazine, 16 Feb. 2024
Cite this Entry
“Cephalosporin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cephalosporin. Accessed 19 Jul. 2025.
Copy CitationMedical Definition
cephalosporin
noun
ceph·a·lo·spo·rin
ˌsef-ə-lə-ˈspōr-ən, -ˈspȯr-
: any of several beta-lactam antibiotics produced by an imperfect fungus of the genus Acremonium or made semisynthetically
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