Pronunciation: (rā'dē-ā"tur), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.