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.
These surfactants excel at emulsifying oils and perform better than anionic surfactants at removing organic soils. Anna Giorgi, Verywell Health, 4 Mar. 2025 Pods, while convenient, often contain higher concentrations of surfactants and stabilizers, which can be harsher on sensitive skin. Christa Joanna Lee, Allure, 4 Mar. 2025 The milk surfactants create varying points of resistance as the dye makes its way through the maze. Ars Technica, 28 Feb. 2025 Spending more time gently massaging your cleanser can help surfactants—compounds that enable water to mix with oil and dirt—do their job more effectively. Cathy Cassata, Health, 25 Feb. 2025 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

Browse Nearby Words

Cite this Entry

“Surfactant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/surfactant. Accessed 31 Mar. 2025.

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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!