# watt

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Related to watt: James Watt, Joule, Watt hour

## watt

[for James WattWatt, James,
1736–1819, Scottish inventor. While working at the Univ. of Glasgow as an instrument maker, Watt was asked to repair a model of Thomas Newcomen's steam engine.
], abbr. W, unit of power, or work done per unit time, equal to 1 joule per second. It is used as a measure of electrical and mechanical power. One watt is the amount of power that is delivered to a component of an electric circuit when a current of 1 ampere flows through the component and a voltage of 1 volt exists across it. The derivative units are kilowatt (1,000 W; kW) and megawatt (1,000,000 W; MW), used in electric power systems, and milliwatt (0.001 W; mW) and microwatt (0.000001 W; μW), used in electronics.

## watt

(wot) Symbol: W. The SI unit of power, defined as the power resulting from the dissipation of one joule of energy in one second.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

## watt

[wät]
(physics)
The unit of power in the meter-kilogram-second system of units, equal to 1 joule per second. Symbolized W.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## watt

A unit of power; the power required to do work at the rate of 1 joule per second, which is equal to the power dissipated in an electric circuit in which a potential difference of 1 volt causes a current of 1 ampere to flow.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

## watt

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.

## Watt

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 Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## watt

The standard unit of measurement of electrical power. In a direct current (DC) circuit, one watt is one ampere of current flowing at one volt. In an alternating current (AC) circuit, watt ratings are a calculation of how the circuit reacts to the AC source. See volt-amps and RMS.
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References in periodicals archive ?
James Watt's son James had a son named John in 1832.
The task would change not only Watt's life, but those of countless others.
Liam Jones said that he was walking down the road with Mr Watt when a police officer suddenly arrested his friend.
It was while repairing a model Newcomen steam engine in 1763 that Watt realised he could improve its efficiency by adding a steam condenser to avoid heat loss and conserve fuel.
The WATT portfolio in the '20s, '30s and '40s grew through start-ups and by acquisitions.
Watt's machine was very popular because it was four times more powerful than those that had been based on the Thomas Newcomen design.
Outside court Michael's mother Rosalie said he was incapable of standing up for himself against the Watt family.
Mighty Watt and Mighty Watt Plus cartridge heaters.
Among DOE's goals: LEDs that produce at least 150 lumens per watt in commercial units.
In Aphra Behn's Oroonoko, for example--a fiction that predates Defoe's Robinson Crusoe, the text Watt cites as a landmark in the emergence of formal realism, by about thirty years--my students noted the presence of both realistic and unrealistic characters and settings, a concurrence that would seem to trouble Watt's hypothesis.
IMS Director of Equipment Dave Watt says IMS now has nine Sennebogen 835 models at the three mills.
David Harrington Watt also struggles with contradictions regarding the millions of Christians in hundreds of thousands of congregations across the U.S.

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