Pirani
/pɪˈrɑːni/Physics
noun
Attributive Designating a gauge which measures very low pressures by utilizing the cooling effect of the gas on a heated metal filament whose resistance is sensitive to temperature. Chiefly in Pirani gauge.
Origin
Early 20th century. From the name of Marcello Stefano von Pirani, German physicist, who invented the gauge.
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