su·per·heat 
(s′pər-hēt)
(s′pər-hēt)tr.v. su·per·heat·ed, su·per·heat·ing, su·per·heats
1. To heat excessively; overheat.
2. To heat (steam or other vapor not in contact with its own liquid) beyond its saturation point at a given pressure.
3. To heat (a liquid) above its boiling point without causing vaporization.
n. (spər-hēt′)
1. The amount by which a vapor is superheated.
2. The heat imparted during the process of superheating.
su′per·heater n.