Watt(wŏt), James 1736-1819.
British engineer whose innovations, such as the condensing engine (1769) and the centrifugal governor (1788), greatly increased the efficiency and practicality of steam power.
Watt, James 1736-1819.
British engineer, inventor, and scientist. He invented the steam engine (1769) and devised the unit of horsepower. The watt unit of power is named for him.