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).
In biochemistry, lipids are molecular organic compounds, composed largely of carbon and hydrogen, that are essential for cell growth. Lipids are non-soluble in water and combine with carbohydrates and proteins to form the majority of all plant and animal cells.They are more commonly synonymous with the word fats when speaking in terms of personal health. Although all fats are lipids, not all lipids are fats.ipids are non-soluble in water and combine with carbohydrates and proteins to form the majority of all plant and animal cells. They are more commonly synonymous with the word fats when speaking in terms of personal health.