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Definition of: heater
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(hē′tər) noun
1. Any device, apparatus, or contrivance designed to generate, impart, transmit, or conserve heat, as a stove, radiator, etc.
2. One who attends to the heating of something: often in combination: a rivet heater.
3. Electronics An element which supplies current for heating the cathode of a vacuum tube.
4. Colloq. A pistol or revolver.
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