superheat

verb

1. To heat a liquid above its boiling point
2. To heat a vapour above its saturation point
3. To heat too much, to overheat.

   “to superheat an oven”

noun

1. (uncountable)The excess of temperature of a vapour above its temperature of saturation.

   “In addition to all this, the fluidity of the steam itself was much increased by high superheat, usually achieved by means of the Houlet superheater.”