Ra"di*a`tor (-A`tər), 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.
© Webster 1913
Ra"di*a`tor (?), n.
1.
Any of various devices for cooling an internal substance by radiation, as a system og rings on a gun barrel for cooling it, or a nest of tubes with large radiating surface for cooling circulating water, as in an automobile.
2. (Wireless Teleg.)
An oscillator.
© Webster 1913