surfactant

noun

sur·​fac·​tant (ˌ)sər-ˈfak-tənt How to pronounce surfactant (audio)
ˈsər-ˌfak-
: a surface-active substance (such as a detergent)
surfactant adjective

Examples of surfactant in a Sentence

Recent Examples on the Web
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.
Spray the leaves with water, which acts as a surfactant for the baking soda to adhere to. — Madeline Buiano, Martha Stewart, 4 July 2026 Because curls tend to frizz and dry out, most of these shampoos avoid harsh detergents called surfactants. — Bestreviews, Chicago Tribune, 20 Apr. 2026 Detergent works through surfactants — molecules that break up dirt and oil so water can rinse them away. — Ryan Brennan may 14, Miami Herald, 14 May 2026 The cleanser has an organic compound called surfactants. — Mallory Carra, The Spruce, 14 June 2026 See All Example Sentences for surfactant

Word History

Etymology

surface-active + -ant

First Known Use

1950, in the meaning defined above

Time Traveler
The first known use of surfactant was in 1950

Phrases Containing surfactant

Rhymes for surfactant

See All Rhymes for surfactant

Browse Nearby Words

surfacing machine
surfactant
surfacy
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Cite this Entry

“Surfactant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/surfactant. Accessed 7 Jul. 2026.

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Medical Definition

surfactant

noun
sur·​fac·​tant (ˌ)sər-ˈfak-tənt, ˈsər-ˌ How to pronounce surfactant (audio)
: a surface-active substance
specifically : a surface-active lipoprotein mixture which coats the alveoli and which prevents collapse of the lungs by reducing the surface tension of pulmonary fluids
surfactant adjective

More from Merriam-Webster on surfactant

Britannica.com: Encyclopedia article about surfactant

Last Updated: - Updated example sentences
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