from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A closed tank in which water is converted into steam under pressure.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A boiler that is designed to produce and withstand the pressure of steam at 300psi (2070kPa) or less.

from the GNU version of the Collaborative International Dictionary of English

  • n. a boiler for producing steam. See Boiler, 3, and Note. In the illustration, the shell a of the boiler is partly in section, showing the tubes, or flues, which the hot gases, from the fire beneath the boiler, enter, after traversing the outside of the shell, and through which the gases are led to the smoke pipe d, which delivers them to the chimney; b is the manhole; c the dome; e the steam pipe; f the feed and blow-off pipe; g the safety valve; hthe water gauge.

from The Century Dictionary and Cyclopedia

  • n. A receptacle or vessel in which water is heated and boiled to generate steam; particularly, a receptacle or vessel in which the water is confined, or isolated from the external air, in order to generate steam under a pressure equal to or exceeding that of the atmosphere, for the conversion of its expansive force into work in a steammotor or -engine, or for heating purposes.
  • n. A single boiler, or a battery of boilers, combined with other apparatus, as a feed-water heater or a superheater, for facilitating the production or for the superheating of steam.
  • n. A sectional boiler.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. sealed vessel where water is converted to steam


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