A monomer (/ˈmɒnəmər/ MON-ə-mər) (mono-, "one" + -mer, "part") is a molecule that may bind chemically to other molecules to form a polymer. The term "monomeric protein" may also be used to describe one of the proteins making up a multiprotein complex. The most common natural monomer is glucose, which is linked by glycosidic bonds into polymers such as cellulose, starch, and glycogen.