Radiator n. : That which radiates or emits rays, whether of light or heat; especially, that part of a heating apparatus from which the heat is radiated or diffused; as, a steam radiator.

Example:
Radiator is emptying into bottle and not maintaining coolant?

Taxonomy
Radiator, electric radiators, free encyclopedia, automobiles, heat, convector, Search, forced convection, liquid coolant, transfer heat, Articles lacking sources, engine cooling, central heating system, antenna, heat sinks, Electrical element, thermal energy, the fluid.

Defination from the web:
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 ... Main article: Radiator (engine cooling) ...