<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A chemically heterogeneous group of organic compounds found in food that are insoluble in water but soluble in nonpolar solvents.</n0:def-definition><n0:def-source>CRCH</n0:def-source></n0:ComplexDefinition>
<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>A class of food constituents, also known as fats and oils, that serve as a source of energy and essential fatty acids in animals. The major components of lipids are fatty acids, triglycerides, phospholipids, glycolipids, sphingolipids, steroids (cholesterol), and lipoproteins.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>