monomer /mon″əmər/ [Gk, monos + meros, part] , 1. a molecule that repeats itself to form a polymer, such as a molecule of fibrin monomer that polymerizes to form fibrin in the blood-clotting process. −monomeric, adj. 2. a simple molecule of relatively low molecular weight, which is capable of reacting chemically with other molecules to form a dimer, trimer, or polymer. 3. some basic unit of a molecule, either the molecule itself or functional subunit of it.
