ex·tem·po·ri·za·tion \ikˌstempərə̇ˈzāshən, (ˌ)ekˌ-, -ˌrīˈz-\noun (-s) 1.: the act of extemporizing : improvisation 2.: something produced or marked by extemporization < ingenious extemporizations were employed to provide substitutes for customary foods, clothing, and household articles — A.D.Kirwan >