Lipids are not polymers, because they are not built from monomers (units with similar composition).

What are the monomers of lipids?

Glycerol and fatty acids are the monomers of lipids.

What are the 4 types of monomers?

Monomers are atoms or small molecules that bond together to form more complex structures such as polymers. There are four main types of monomer, including sugars, amino acids, fatty acids, and nucleotides.