: of, relating to, or being a compound (such as a surfactant) consisting of molecules having a polar water-soluble group attached to a water-insoluble hydrocarbon chain
also : being a molecule of such a compound

Examples of amphiphilic in a Sentence

Recent Examples on the Web
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Emulsifiers like mustard or egg yolk are amphiphilic, as are some chemicals used as part of soap. — Caroline Delbert, Popular Mechanics, 6 May 2023 Chemists probably already know that these amphiphilic stabilizers are often a surfactant—a small molecule with a hydrophobic end and a hydrophilic end, such as those in detergents. — IEEE Spectrum, 16 Mar. 2022 Our ever-present, super-affordable, totally amphiphilic friend SOAP is here to save us all. — Heather Arndt Anderson, Sunset Magazine, 12 Mar. 2020 This article reviews several examples of systems with such characteristics that have been studied, focusing on chemical systems containing amphiphilic molecules. — Sean Carroll, Discover Magazine, 18 Nov. 2010

Word History

Etymology

amphi- + -philic

First Known Use

1948, in the meaning defined above

Time Traveler
The first known use of amphiphilic was in 1948

Browse Nearby Words

Cite this Entry

“Amphiphilic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/amphiphilic. Accessed 30 Sep. 2026.

Medical Definition

amphiphilic

adjective
: of, relating to, consisting of, or being one or more molecules (as of a glycolipid or sphingolipid) in a biological membrane having a polar water-soluble terminal group attached to a water-insoluble hydrocarbon chain
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