unimolecular reaction

(redirected from monomolecular reaction)
Also found in: Medical.

unimolecular reaction

[¦yü·nə·mə′lek·yə·lər rē′ak·shən]
(physical chemistry)
A chemical reaction involving only one molecular species as a reactant; for example, 2H2O → 2H2+ O2, as in the electrolytic dissociation of water.