Definition of SET THEORY. : a branch of mathematics or of symbolic logic that deals with the nature and relations of sets. â set theoretic adjective. See set theory defined for kids. ADVERTISEMENT.
Broadly, the term lipid is encompasses fats (including saturated, monoglyceride, diglyceride and triglyceride), waxes, sterols, phospholipids in the membranes of cells and fat soluble vitamins. Lipid is a basic term representing a molecule that is fat soluble (vs. water soluble).
lipid (lipÂ´id) , n a heterogeneous group of substances related actually or potentially to the fatty acids that are soluble in nonpolar solvents such as benzene, chloroform, and ether and are relatively insoluble in water. Included are the fatty acids, acylglycerols, phospholipids, cerebrosides, and steroids.ny of a group of organic compounds, including the fats, oils, waxes, sterols, and triglycerides, that are insoluble in water but soluble in common organic solvents, are oily to the touch, and together with carbohydrates and proteins constitute the principal structural material of living cells. lipÂ·idâ²ic adj.