It used to be called the centigrade scale but this name was officially dropped in 1948. Kelvin is the scale that is most commonly used in thermodynamics. No thermal energy exists in an object when it is at this temperature. The temperature interval is set to be the same as for the Celsius scale. This is a measure of the ability of a material to absorb heat energy.
Water has the largest heat capacity of any material.
This is quite important in a practical sense. This means it is slow to heat and slow to cool. Think about heating a pan of water. The pan heats up quickly and it takes a while for the water to heat. This is also why bodies of water act as climate moderators.