I. Kelvin adjective
Etymology: William Thomson, Lord Kelvin
Date: 1908
: relating to, conforming to, or having a thermometric scale on which the unit of measurement equals the Celsius degree and according to which absolute zero is 0 K, the equivalent of -273.15°C
II. Kel·vin ˈkel-vən biographical name
1st Baron 1824-1907 William Thomson British mathematician & physicist