lecithin

noun

lec·​i·​thin ˈle-sə-thən How to pronounce lecithin (audio)
: any of several waxy hygroscopic phospholipids that are widely distributed in animals and plants, form colloidal solutions in water, and have emulsifying, wetting, and antioxidant properties
also : a mixture of or substance rich in lecithins

Examples of lecithin 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.
Cool Science: The mustard contains lecithin, an emulsifier. — Jamie Kiffel-Alcheh, National Geographic, 20 May 2020 Other types of emollients include lecithin, isopropyl myristate and isopropyl palmitate. — Nia Decaille, Washington Post, 7 Feb. 2020

Word History

Etymology

International Scientific Vocabulary, from Greek lekithos yolk of an egg

First Known Use

1861, in the meaning defined above

Time Traveler
The first known use of lecithin was in 1861

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Cite this Entry

“Lecithin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lecithin. Accessed 20 Mar. 2025.

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Kids Definition

lecithin

noun
lec·​i·​thin ˈles-ə-thən How to pronounce lecithin (audio)
: any of several waxy phosphorus-containing substances that are common in animals and plants and are used especially in foods (as mayonnaise), medicine, and industrial processes

Medical Definition

lecithin

noun
lec·​i·​thin ˈles-ə-thən How to pronounce lecithin (audio)
: any of several waxy hygroscopic phospholipids in which phosphatidic acid has formed an ester with choline and which are widely distributed in animals and plants, form colloidal solutions in water, and have emulsifying, wetting, and antioxidant properties
also : a mixture of or a substance rich in lecithins

called also phosphatidylcholine

More from Merriam-Webster on lecithin

Britannica.com: Encyclopedia article about lecithin

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