lecithin

noun

lec·​i·​thin ˈle-sə-thən 

: 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

The protein-rich food contains vitamins, minerals, cholesterol-fighting lecithin, and hormone-balancing phytoestrogens. — Alessandra Signorelli, Vogue, 23 July 2026

Soy lecithin emulsifies ingredients, such as oil and water, to blend the salad dressing into a smooth consistency, Judy Simon, a clinical dietitian nutritionist at the University of Washington, previously told USA TODAY. — James Powel, USA Today, 15 June 2026

Spirulina helps eliminate heavy metal build-up in the body, for instance; ginger and cumin reduce bloating; lecithin and gingko can improve memory. — Condé Nast, Condé Nast Traveler, 2 June 2026

Depending on the brand, kettle corn is typically made with ingredients such as corn syrup, sugar, butter, salt, canola oil, and soy lecithin (an emulsifier or texture enhancer). — Lauren Panoff, Verywell Health, 27 Feb. 2026

Word History

Etymology

International Scientific Vocabulary, from Greek lekithos yolk of an egg

First Known Use

1861, in the meaning defined above

Kids Definition

lecithin

noun

lec·​i·​thin ˈles-ə-thən 

: 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 

: 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