heater


noun

  1. any of various apparatus for heating, especially for heating water or the air in a room.
  2. Electronics. the element of a vacuum tube that carries the current for heating a cathode.
  3. Slang. a pistol, revolver, or other firearm.

noun

  1. any device for supplying heat, such as a hot-air blower, radiator, convector, etc
  2. US slang a pistol
  3. electronics a conductor carrying a current that indirectly heats the cathode in some types of valve
n.

c.1500, of persons, agent noun from heat. Of devices, from 1660s. Baseball slang meaning “fastball” is attested by 1985.

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