chlorhexidine

noun

chlor·​hex·​i·​dine klȯr-ˈhek-sə-ˌdīn How to pronounce chlorhexidine (audio)
-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

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Misusing chlorhexidine can result in significant adverse reactions. — Sherri Gordon, Health, 21 Nov. 2024 For example, chlorhexidine is used for treating conditions such as gum disease, mouth ulcers, and oral thrush. — Heather Jones, Verywell Health, 5 Jan. 2025

Word History

Etymology

International Scientific Vocabulary chlor- + hex- + -idine

First Known Use

1957, in the meaning defined above

Time Traveler
The first known use of chlorhexidine was in 1957

Rhymes for chlorhexidine

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Browse Nearby Words

chloretone
chlorhexidine
chlorhydrin
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Cite this Entry

“Chlorhexidine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/chlorhexidine. Accessed 26 Apr. 2025.

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Medical Definition

chlorhexidine

noun
chlor·​hex·​i·​dine klōr-ˈhek-sə-ˌdīn, klȯr-, -ˌdēn How to pronounce chlorhexidine (audio)
: 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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