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[rey-dee-ey-ter] /ˈreɪ diˌeɪ tər/
a person or thing that radiates.
any of various heating devices, as a series or coil of pipes through which steam or hot water passes.
a device constructed from thin-walled tubes and metal fins, used for cooling circulating water, as in an automobile engine.
Radio. a transmitting antenna.
Origin of radiator
1830-40; radiate + -or2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for radiator
  • The heat was removed from the sealed water system through an in-room radiator: room air was cooled by normal air conditioning.
  • Temperature differences between rooms might signal problems with the air ducts or radiator venting.
  • Every cooling system will have an overflow reservoir next to the radiator.
  • Its only sources of heat are a small radiator and two vertical steam pipes, one in the kitchen and the other in the bathroom.
  • He combined an old board and a typewriter stand to create a bar atop a radiator.
  • The auto-animal may have begun with radiator ornaments, with bulldogs and flying swans and eagles.
  • The radiator will have custom six inch inlet outlet connections to help reduce fluid pressure loss.
  • The radiator was sized according to the generators heat rejection requirements of the engine.
  • The vapor-chamber fin radiator was evaluated for both stainless-steel-clad and all stainless-steel fins.
  • Both of these effects can cause the radiator to tilt, preventing water from properly draining from the radiator when it cools.
British Dictionary definitions for radiator


a device for heating a room, building, etc, consisting of a series of pipes through which hot water or steam passes
a device for cooling an internal-combustion engine, consisting of thin-walled tubes through which water passes. Heat is transferred from the water through the walls of the tubes to the airstream, which is created either by the motion of the vehicle or by a fan
(Austral & NZ) an electric fire
(electronics) the part of an aerial or transmission line that radiates electromagnetic waves
an electric space heater
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for radiator

1836, "any thing that radiates," agent noun in Latin form from radiate. Meaning "heater" is from 1851; sense of "cooling device in internal combustion engine" is 1900.

Online Etymology Dictionary, © 2010 Douglas Harper
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radiator in Science
A body that emits radiation. Radiators are commonly designed to transfer heat energy from one place to another, as in an automobile, in which the radiator cools the engine by transferring heat energy from the engine to the air, or in buildings, where radiators transfer heat energy from a furnace to the air and objects in the surrounding room.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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