Superheat /(?)/

imp. & p. p. Superheated; p. pr. & vb. n. Superheating

1. To heat too much, to overheat; as, to superheat an oven.
2. To heat, as steam, apart from contact with water, until it resembles a perfect gas. (Steam Engine)
3. To heat (a liquid) above its boiling point without converting it into vapor.

1. The increase of temperature communicated to steam by superheating it.