surfactant

noun

sur·​fac·​tant (ˌ)sər-ˈfak-tənt 

ˈsər-ˌfak-

: a surface-active substance (such as a detergent)

surfactant adjective

Examples of surfactant in a Sentence

Recent Examples on the Web

This drugstore pick is especially designed for anyone experiencing mild or normal shedding due to breakage and helps restore strength by using gentle surfactants while cleansing. —Jamie Wilson, Glamour, 20 Feb. 2026

Dish soap’s surfactants bind to grease and water, lifting grime without scrubbing. —Mallory Carra, The Spruce, 19 Feb. 2026

The micelles — tiny molecules that act as surfactants — dissolve and lift the product away effortlessly. —Jacqueline Kilikita, Refinery29, 5 Feb. 2026

Most wet wipes contain alcohol, surfactants, fragrances, and preservatives. —Jamie Cuccinelli, Martha Stewart, 20 Jan. 2026

Word History

Etymology

surface-active + -ant

First Known Use

1950, in the meaning defined above

Phrases Containing surfactant

• co-surfactant

Rhymes for surfactant

• attractant
• extractant
• reactant

Medical Definition

surfactant

noun

sur·​fac·​tant (ˌ)sər-ˈfak-tənt, ˈsər-ˌ 

: 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