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