Kelvin (unit)

Kelvin was a unit of measurement indicating temperature.

When arriving on Venus, Zara noted that the mean surface temperature was 735 degrees Kelvin, to which Abby responded that it was "just Kelvin, you don't say degrees". (AUDIO: The Dance)

Madame Vastra used a too which caused a localised reduction in temperature to approximately -200 Kelvin against the Gribbilites infesting 13 Paternoster Row. (AUDIO: Merry Christmas, Mr Jago)