T0281000 (tôr′ə-chĕl′ē, tôr′ē-), Evangelista 1608-1647. Italian mathematician and physicist who invented the mercury barometer.
Tor·ri·cel·li
(tō′rə-chĕl′ē), Evangelista 1608-1647. Italian mathematician and physicist who discovered that the atmosphere exerts pressure. He demonstrated that this pressure affected the level of mercury in a tube, thereby inventing the mercury barometer.