The Collaborative International Dictionary
Superheat \Su`per*heat"\, v. t. [imp. & p. p. Superheated; p. pr. & vb. n. Superheating.]
To heat too much, to overheat; as, to superheat an oven.
(Steam Engine) To heat, as steam, apart from contact with water, until it resembles a perfect gas.
To heat (a liquid) above its boiling point without converting it into vapor.
Wiktionary
n. The heating of a substance above a temperature at which a change of state normally occurs, without it occurring; especially to heat a liquid above its boiling point vb. (present participle of superheat English)
Wikipedia
In physics, superheating (sometimes referred to as boiling retardation, or boiling delay) is the phenomenon in which a liquid is heated to a temperature higher than its boiling point, without boiling. Superheating is achieved by heating a homogeneous substance in a clean container, free of nucleation sites, while taking care not to disturb the liquid.
Usage examples of "superheating".
Unfortunately, EB11/R doesn't explain how superheating was carried out, and EA contents itself with a cryptic, "this mechanism returned the steam through the fire tubes of the boiler for reheating.
The necessary advances in the iron and oil industries will take some years, which is why I see superheating as a second generation feature.
For a minute the combine just burned steadily, the flames having not yet reached its own interior fuel tank, melting snow, curling paint, and superheating old steel and iron with a hiss that filled the night.
The energy of the explosions caused superheating of the immediate surroundings.
Scott squinted as flames geysered up out of the sands, instantly superheating the air and filling it up with the stench of death.