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 is a medical term for fat found in the bloodstream. There are different types of lipids, some good and some bad.otal cholesterol is the sum of all cholesterol in the blood. Even if your total cholesterol is below 200 mg/dL, you may still be at risk for heart disease if your individual lipid measures are not within recommended levels.