The two crossword solutions for the term 'Unit of Temperature' are Kelvin (6 letters) and DEGREE (6 letters). Kelvin is a unit of temperature measurement that is part of the International System of Units (SI). It is named after the British physicist William Thomson, 1st Baron Kelvin. The Kelvin scale is based on absolute zero, which is the lowest temperature possible. DEGREE is also a unit of temperature measurement, but it is part of the Imperial System of Units. It is based on the Celsius scale, which is derived from the freezing and boiling points of water.