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watt

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watt

  [wot]
Use watt in a Sentence
–noun
the SI unit of power, 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; named after J. Watt

Watt

  [wot]
–noun
James, 1736–1819, Scottish engineer and inventor.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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watt   (wŏt)   
n.   Electricity Abbr. W
An International System unit of power equal to one joule per second. See Table at measurement.

[After James Watt.]
Watt   (wŏt)   
British engineer and inventor who made fundamental improvements in the steam engine, resulting in the modern high-pressure steam engine (patented 1769).
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Cultural Dictionary

watt

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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Word Origin & History

watt 
unit of electrical power, 1882, in allusion to James Watt (1736-1819), Scottish engineer and inventor. Wattage is recorded from 1903.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: watt
Pronunciation: 'wät
Function: noun
: the absolute mks unit of power equal to the work done at the rate of one joule per second or tothe power produced by a current of one ampere across a potential difference of one volt : 1/746 horsepower
Watt, James (1736–1819), Britishengineer and inventor. Watt's steam engine played a major role in the coming of the Industrial Revolution and came to be used in paper mills, flour mills, cotton mills, iron mills, distilleries,canals, and waterworks. At the end of the 19th century the International Electrical Congress named the watt, the unit of electrical power, in his honor.
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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Science Dictionary
watt   (wŏt)  Pronunciation Key 
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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Encyclopedia

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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