Definitions for "macromolecule"
A very large molecule, especially a polymer having from hundreds to many thousands of atoms, such as DNA, RNA, protein, polysaccharide, polyethylene, polycarbonate, etc.
a large molecule, such as DNA, RNA or protein, that has a molecular weight of at least a few thousand daltons.
A giant polymeric molecule. The macromolecules are proteins, polysaccharides, and nucleic acids.