n.
Molecule of any of a class of mostly organic compounds that can react with other molecules of the same or other compounds to form very large molecules ( polymer s).
The essential feature of monomer molecules is the ability to form chemical bonds (see bonding ) with at least two other monomer molecules (polyfunctionality). Those able to react with two others can form only chainlike polymers; those able to react with three or more can form cross-linked, network polymers. Examples of monomers (and their polymers) are styrene (polystyrene), ethylene ( polyethylene ), and amino acid s ( protein s).