- A class of lipid molecules in which a phosphate group is linked to glycerol and two fatty acyl groups. A chief component of biological membranes.
- A lipid that contains phosphorus, most commonly a compound of glycerol with two fatty acids and one phosphate group. Normally the phosphate is also linked to a small molecule such as choline, serine, ethanolamine or inositol.
Source: Biotechnology Glossary