radiator -
a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan
mechanism the technical aspects of doing something; "a mechanism of social control"; "mechanisms of communication"; "the mechanics of prose style"
radiator -
Automotive A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.
radiator -
Buildings A finned metal fixture that carries hot water or steam in order to heat a room.
radiator -
A type of antenna.
Wikipedia
Radiators are heat exchangers used to transfer thermal energy from one medium to another for the purpose of cooling and heating. The majority of radiators are constructed to function in automobiles, buildings, and electronics. The radiator is always a source of heat to its environment, although this may be for either the purpose of heating this environment, or for cooling the fluid or coolant supplied to it, as for engine cooling.