yolk lecithin

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• Lecithin — is any of a group of yellow brownish fatty substances occurring in animal and plant tissues, and in egg yolk, composed of phosphoric acid, choline, fatty acids, glycerol, glycolipids, triglycerides, and phospholipids (e.g., phosphatidylcholine,… …   Wikipedia

• Lecithin — Lec i*thin, n. [Gr. le kiqos the yolk of an egg.] (Physiol. Chem.) A complex, nitrogenous phosphorized substance widely distributed through the animal body, and especially conspicuous in the brain and nerve tissue, in yolk of eggs, and in the… …   The Collaborative International Dictionary of English

• lecithin — [les′i thin] n. [< Gr lekithos, yolk of an egg + IN1] any of several phosphatides found in nerve tissue, blood, milk, egg yolk, soybeans, corn, etc.: used in medicine, foods, cosmetics, etc. as a wetting, emulsifying, and penetrating agent …   English World dictionary

• lecithin — fatty substance found in the yolks of eggs (among other places), 1861, from Fr. lécithine (coined 1850 by N.T. Gobley), from Gk. lekithos egg yolk, + chemical suffix INE (Cf. ine) (2). Gk. lekithos is of unknown origin …   Etymology dictionary

• lecithin — /les euh thin/, n. 1. Biochem. any of a group of phospholipids, occurring in animal and plant tissues and egg yolk, composed of units of choline, phosphoric acid, fatty acids, and glycerol. 2. a commercial form of this substance, obtained chiefly …   Universalium

• lecithin — Traditional term for 1,2 diacyl sn glycero 3 phosphocholines or 3 sn phosphatidylcholines, phospholipids that on hydrolysis yield two fatty acid molecules and a molecule each of glycerophosphoric acid and choline. In some varieties of l., both… …   Medical dictionary

• yolk — also yoke noun Etymology: Middle English yolke, from Old English geoloca, from geolu yellow more at yellow Date: before 12th century 1. a. the yellow spheroidal mass of stored food that forms the inner portion of the egg of a bird or reptile and… …   New Collegiate Dictionary

• yolk — 1. One of the types of nutritive material stored in the ovum for the nutrition of the embryo; y. is particularly abundant and conspicuous in the eggs of birds. SYN: vitellus. 2. Fatty material found in the wool of sheep; when extracted and… …   Medical dictionary

• lecithin — [ lɛsɪθɪn] noun Biochemistry a substance found in egg yolk and other animal and plant tissues, consisting of phospholipids linked to choline. Origin C19: from Gk lekithos egg yolk + in1 …   English new terms dictionary

• lecithin — lec•i•thin [[t]ˈlɛs ə θɪn[/t]] n. 1) biochem. any of a group of phospholipids, containing choline and fatty acids, that are a component of cell membranes and are abundant in nerve tissue and egg yolk 2) a commercial form of this substance •… …   From formal English to slang

• lecithin — /ˈlɛsəθən / (say lesuhthuhn) noun a compound found in many animal and plant tissues, such as egg yolk, used as an emulsifier and stabiliser in foods; phosphatidylcholine. {Greek lekithos egg yolk + in2} …