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
heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings
very fast; capable of quick response and great speed; "a hot sports car"; "a blistering pace"; "got off to a hot start"; "in hot pursuit"; "a red-hot line drive"
hot enough to raise (or as if to raise) blisters; "blistering sun"
characterized by undue haste and lack of thought or deliberation; "a hotheaded decision"; "liable to such impulsive acts as hugging strangers"; "an impetuous display of spending and gambling"; "madcap escapades"; (`brainish' is archaic)