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  • 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