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watt

[wot] /wɒt/
noun
1.
the standard unit of power in the International System of Units (SI), equivalent to one joule per second and equal to the power in a circuit in which a current of one ampere flows across a potential difference of one volt.
Abbreviation: W, w.
Origin
1882
1882; named after J. Watt

Watt

[wot] /wɒt/
noun
1.
James, 1736–1819, Scottish engineer and inventor.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for watt

watt

/wɒt/
noun
1.
the derived SI unit of power, equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a potential difference of 1 volt. 1 watt is equivalent to 1.341 × 10–3 horsepower W
Word Origin
C19: named after James Watt

Watt

/wɒt/
noun
1.
James. 1736–1819, Scottish engineer and inventor. His fundamental improvements to the steam engine led to the widespread use of steam power in industry
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for watt
n.

unit of electrical power, 1882, in honor of James Watt (1736-1819), Scottish engineer and inventor.

Online Etymology Dictionary, © 2010 Douglas Harper
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watt in Medicine

watt (wŏt)
n.
Abbr. W
A unit of power in the International System of Units equal to one joule per second.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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watt in Science
watt
  (wŏt)   
The SI derived unit used to measure power, equal to one joule per second. In electricity, a watt is equal to current (in amperes) multiplied by voltage (in volts).
Watt, James 1736-1819.  
British engineer and inventor who patented a much improved version of the steam engine (1769) and devised the unit of horsepower. The watt unit of power is named for him.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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watt in Culture

watt definition


The basic unit of power, named after the eighteenth-century Scottish inventor James Watt.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for watt

unit of power in the International System of Units (SI) equal to one joule of work performed per second, or to 1746 horsepower. An equivalent is the power dissipated in an electrical conductor carrying one ampere current between points at one volt potential difference. It is named in honour of James Watt, British engineer and inventor. One thousand watts equal one kilowatt. Most electrical devices are rated in watts.

Learn more about watt with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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