choline

noun

cho·​line ˈkō-ˌlēn 

: a basic compound C₅H₁₄NO that is found in various foods (such as egg yolks and legumes) or is synthesized in the liver, that is a component of lecithin and a precursor of acetylcholine, and that is essential to the metabolism of fat in the liver and is usually included in the vitamin B complex

Examples of choline in a Sentence

Recent Examples on the Web

The dietary interventions included the Mediterranean diet, ketogenic diet, and omega-3 and methyl-donor supplements, including B12, folate, choline, and methionine. —Michele Laufik, Martha Stewart, 2 Apr. 2026

May Improve Brain Development and Function Chicken is a rich source of choline and is reasonably high in vitamin B12. —Lindsey Desoto, Health, 1 Apr. 2026

By contrast, whole, unprocessed cuts of meat provide nutrients such as protein, iron, zinc, B vitamins, and choline, Yassine says. —Tom Gavin, EverydayHealth.com, 23 Mar. 2026

Hard-Boiled Eggs Instead of: Protein bars or jerky Eggs are a nutrient-dense snack full of protein, vitamins, and minerals like choline, folate, vitamin D, and iodine.6 Eating eggs can help build muscle and maintain a healthy weight. —Cory Martin, Verywell Health, 16 Mar. 2026

Word History

Etymology

International Scientific Vocabulary

First Known Use

circa 1871, in the meaning defined above

Kids Definition

choline

noun

cho·​line ˈkō-ˌlēn 

: a vitamin of the vitamin B complex that is widely distributed in animal and plant products (as eggs and beans) and is necessary for the activities of the liver

Medical Definition

choline

noun

cho·​line ˈkō-ˌlēn 

: a basic compound C₅H₁₄NO that is found in various foods (as egg yolk and legumes) or is synthesized in the liver and that is a component of lecithin, is a precursor of acetylcholine, and is essential to liver function