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A natural amine, C5H15NO2, often classed in the vitamin B complex, that is a constituent of lecithin and other phospholipids and is a precursor of certain biologically important molecules, such as acetylcholine.


(ˈkəʊliːn; -ɪn; ˈkɒl-)
(Biochemistry) a colourless viscous soluble alkaline substance present in animal tissues, esp as a constituent of lecithin: used as a supplement to the diet of poultry and in medicine for preventing the accumulation of fat in the liver. Formula:[(CH3)3NCH2CH2OH]+OH
[C19: from chole- + -ine2, so called because of its action in the liver]


(ˈkoʊ lin, ˈkɒl in)

a viscous fluid, C5H14N + O, that is a constituent of lecithin and a primary component of the neurotransmitter acetylcholine: one of the B complex vitamins.
[1865–70; < German Cholin (1862) < Greek chol(ḗ) bile + -in -ine2]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.choline - a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fat
B complex, B vitamin, B-complex vitamin, vitamin B, vitamin B complex, B - originally thought to be a single vitamin but now separated into several B vitamins
References in periodicals archive ?
What characteristic of choline chloride leads to the destruction of other vitamins with which it might be stored?
The relevant plant was genetically engineered with choline oxidase (COD), a kind of arthrobacter globiformis, using NPI's proprietary genetic technology MAT Vector System.
Tofu contains many nutrients that are essential for health, such as proteins, lecithin, isoflavone (similar to the hormone estrogen), calcium, and choline, in addition to vitamins E, B1, B2 and niacin.
Lycopene and lutein, calcium and choline, and inulin, fiber and whey are not only the stuff of healthy bodies, but healthy foods.
28 as partial settlement for various antitrust claims relating to vitamins, methionine and choline.
Choline is an essential component of the human diet and is more commonly referred to as Vitamin B4.
The other pathway derives its methyl group from choline and is catalyzed by the enzyme betaine-homocysteine methyitransferase (BHMT).
Among other problems, Young said, it will be difficult to find traces of Pavulon and succinyl choline chloride, the paralyzing drugs Saldivar claims to have administered, or determine if someone stopped breathing naturally or not.
Just one egg a day for six months significantly increases youngsters' levels of the nutrients choline and DHA, both of which are involved in brain health, a study found.
Eggs contain high amounts of choline, which boosts infants' memories and abilities to process information.
Bacon and eggs are rich in choline and a study found in-fants whose mothers consumed more of the nutrient in late pregnancy did better in IQ tests.
Bacon and eggs are rich in choline and a study found infants whose mothers consumed more of the nutrient in late pregnancy did better in IQ tests.