monomolecular adjective. 
[,mɒnǝ(ʊ)mǝ'lɛkjʊlǝ] L19.[from MONO- + MOLECULAR.]Chemistry.
1.  Involving a single molecule; (of a reaction) having a molecularity of one; unimolecular. 
L19.2.  Of a film or layer: one molecule thick. 
E20.  [TahlilGaran] English Dictionary ▲