- 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.
- a commercial form of this substance, obtained chiefly from soybeans, corn, and egg yolk, used in foods, cosmetics, and inks.
- any of a group of phospholipids that are found in many plant and animal tissues, esp egg yolk: used in making candles, cosmetics, and inks, and as an emulsifier and stabilizer in foods (E322)
