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Noun: heater  hee-tu(r)
  1. Device that heats water or supplies warmth to a room
    "They installed a new heater in the bathroom to make winter mornings more comfortable";
    - warmer
     
  2. (baseball) a pitch thrown with maximum velocity
    "The batter couldn't catch up to the pitcher's heater";
    - fastball, smoke, hummer, bullet [N. Amer]

Derived forms: heaters

Type of: delivery, device, pitch

Encyclopedia: Heater