Stimpmeter
n.— «When Tillinghast designed Winged Foot, greens seldom ran much past seven or eight, based on the current speed readings from the Stimpmeter, a device invented in the mid-1930s by Eddie Stimson and adopted and modified by the USGA in 1978. It is the universal method for measuring green speed.» —“Rough Stuff” by Vartan Kupelian in Mamaroneck, N.Y. Detroit News (Michigan) June 15, 2006. (source: Double-Tongued Dictionary)