unimolecular
u ni mo lec u lar |ˌyo͞onəməˈlekyələr ˌjunəməˈlɛkjələr | ▶adjective Chemistry consisting of or involving a single molecule.
uni |mol ¦ecu ¦lar |juːnɪməˈlɛkjʊlə | ▶adjective Chemistry consisting of or involving a single molecule.