An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The vapor into which water is changed when boiled.

From M.E. steme, O.E. steam; cognate with Du. stoom, of unknown origin.

Boxâr, → vapor.

An engine in which the energy of hot → steam is converted into → mechanical power, especially an engine in which the force of expanding steam is used to drive one or more → pistons. The source of the steam is typically external to the part of the machine that converts the steam energy into → mechanical energy (Dictionary.com).

→ steam; → engine.