chlorhexidine
noun
chlor·hex·i·dine
klȯr-ˈhek-sə-ˌdīn 
-ˌdēn
: an antibacterial compound C22H30Cl2N10 used as a local antiseptic (as in mouthwash) and disinfectant especially in the form of its hydrochloride, gluconate, or acetate
Examples of chlorhexidine in a Sentence
Recent Examples on the Web
Lemongrass may be a good alternative to mouthwashes containing chlorhexidine, which can cause unwanted side effects.45
Note: More research on the long-term use of lemongrass essential oil for dental health is needed to confirm its benefits and safety.45
3.
—
Sherri Gordon, Health, 31 July 2025
In contrast, the chlorhexidine and Listerine mouthwashes killed both harmful and helpful microbes indiscriminately.
—New Atlas, 1 July 2025
For example, chlorhexidine is used for treating conditions such as gum disease, mouth ulcers, and oral thrush.
—Heather Jones, Verywell Health, 5 Jan. 2025
If she has gotten bitten, Ms. Darby swabs the cut with chlorhexidine, bribing Katie with treats to stay still.
—Andy Newman, New York Times, 23 Dec. 2024
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Sherri Gordon, Health, 31 July 2025
In contrast, the chlorhexidine and Listerine mouthwashes killed both harmful and helpful microbes indiscriminately.
—New Atlas, 1 July 2025
For example, chlorhexidine is used for treating conditions such as gum disease, mouth ulcers, and oral thrush.
—Heather Jones, Verywell Health, 5 Jan. 2025
If she has gotten bitten, Ms. Darby swabs the cut with chlorhexidine, bribing Katie with treats to stay still.
—Andy Newman, New York Times, 23 Dec. 2024
Cite this Entry
“Chlorhexidine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorhexidine. Accessed 29 Oct. 2025.
Copy CitationMedical Definition
chlorhexidine
noun
chlor·hex·i·dine
klōr-ˈhek-sə-ˌdīn, klȯr-, -ˌdēn
: an antibacterial compound C22H30Cl2N10 that is a biguanide derivative used as a local antiseptic (as in mouthwash) and disinfectant especially in the form of its hydrochloride, gluconate, or acetate
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