radiator

/ˈreɪdiˌeɪtər/
noun
  1. A device that heats a room by circulating hot water or steam through metal panels.
    • In winter, the radiator in the bedroom keeps the space cozy.
    • The old radiator hissed and clanked as it heated the living room.
    • She placed a towel on the radiator to warm it up before her shower.
  2. A part of a vehicle's cooling system that removes heat from the engine.
    • The car's radiator was leaking coolant, so we had to get it repaired.
    • A damaged radiator can cause the engine to overheat quickly.
    • He checked the radiator fluid level before the long road trip.
  3. Something that emits or spreads energy, light, or heat.
    • The sun is a powerful radiator of light and heat.
    • This lamp acts as a radiator of infrared energy for the plants.
    • The metal plate serves as a radiator, dispersing heat from the electronics.
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