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heater

[hee-ter] /ˈhi tər/
noun
1.
any of various apparatus for heating, especially for heating water or the air in a room.
2.
Electronics. the element of a vacuum tube that carries the current for heating a cathode.
3.
Slang. a pistol, revolver, or other firearm.
Origin
1490-1500
1490-1500; heat + -er1
Related forms
reheater, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for reheater

heater

/ˈhiːtə/
noun
1.
any device for supplying heat, such as a hot-air blower, radiator, convector, etc
2.
(US, slang) a pistol
3.
(electronics) a conductor carrying a current that indirectly heats the cathode in some types of valve
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 reheater

heater

n.

c.1500, of persons, agent noun from heat. Of devices, from 1660s. Baseball slang meaning "fastball" is attested by 1985.

Online Etymology Dictionary, © 2010 Douglas Harper
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