a combining form representing idea, in compound words: ideology. ideo-.
Monomers of: Carbohydrates- Glucose Lipids- Fatty acids and glycerol Proteins- Amino acids Nucleic acids- Nucleotides Is an explanation really needed for this because it's really simple to understand?
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).