choline

[koh-leen, kol-een]
noun
1.
Biochemistry. a quaternary ammonium cation, C 5 H 14 N + O, one of the B-complex vitamins, found in the lecithin of many plants and animals.
2.
choline hydroxide, C 5 H 15 NO 2 , the viscous, strongly alkaline commercial form of this compound, usually synthesized, used as a feed supplement, especially for poultry, and in medicine in certain liver conditions.
3.
choline chloride, C 5 H 14 ClNO.

Origin:
1855–60; chol- + -ine2

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Collins
World English Dictionary
choline (ˈkəʊliːn, -ɪn, ˈkɒl-)
 
n
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]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

choline cho·line (kō'lēn')
n.
A natural amine often classed in the vitamin B complex and a constituent of many other biologically important molecules, such as acetylcholine and lecithin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
choline   (kō'lēn')  Pronunciation Key 
A natural amine often classed in the vitamin B complex. It is incorporated into the structure of many other biologically important molecules, such as acetylcholine and lecithin. Chemical formula: C5H15NO2.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The choline nicotine lithium connection is somehow involved in the addiction.
It contains choline and inositol, two compounds that are important for the breakdown of fat and cholesterol.
The fetal origins of memory: the role of dietary choline in optimal brain development.
Choline is a necessary source of methyl groups for methyl group transfer.
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