Lecithin (phosphatidyl choline) One of a group of phospholipids that contain glycerol, fatty acid, phosphoric acid, and choline that are found widely in higher plants and animals, particularly as a component of cell membranes.

• 卵磷脂（磷脂酰胆碱）：磷脂的一种，由甘油、脂肪酸、磷酸和胆碱组成，在高等动植物中广泛存在，是细胞膜的重要组分。