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heater: Meaning and Definition of

heat•er

Pronunciation: (hē'tur), [key]
— n.
  1. any of various apparatus for heating, esp. for heating water or the air in a room.
  2. the element of a vacuum tube that carries the current for heating a cathode.
  3. a pistol, revolver, or other firearm.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
heat equation heat exchanger
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