radiator

noun

1. a person or thing that radiates.
2. any of various heating devices, as a series or coil of pipes through which steam or hot water passes.
3. a device constructed from thin-walled tubes and metal fins, used for cooling circulating water, as in an automobile engine.
4. Radio. a transmitting antenna.

noun

1. a device for heating a room, building, etc, consisting of a series of pipes through which hot water or steam passes
2. a device for cooling an internal-combustion engine, consisting of thin-walled tubes through which water passes. Heat is transferred from the water through the walls of the tubes to the airstream, which is created either by the motion of the vehicle or by a fan
3. Australian and NZ an electric fire
4. electronics the part of an aerial or transmission line that radiates electromagnetic waves
5. an electric space heater

n.

1836, “any thing that radiates,” agent noun in Latin form from radiate. Meaning “heater” is from 1851; sense of “cooling device in internal combustion engine” is 1900.

1. A body that emits radiation. Radiators are commonly designed to transfer heat energy from one place to another, as in an automobile, in which the radiator cools the engine by transferring heat energy from the engine to the air, or in buildings, where radiators transfer heat energy from a furnace to the air and objects in the surrounding room.