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lux

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lux

[luhks]
–noun, plural lu⋅ces [loo-seez] . Optics.
a unit of illumination, equivalent to 0.0929 foot-candle and equal to the illumination produced by luminous flux of one lumen falling perpendicularly on a surface one meter square. Symbol: lx
Also called meter-candle.


Origin:
1885–90; < L lūx light 1

Lux.

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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lux   (lŭks)   
n.   pl. lux·es or lu·ces (lōō'sēz) Abbr. lx
The International System unit of illumination, equal to one lumen per square meter. See Table at measurement.

[Latin lūx, light; see leuk- in Indo-European roots.]
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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Medical Dictionary

Main Entry: lux
Pronunciation: 'l&ks
Function: noun
Inflected Form: plural lux or lux·es
: a unit ofillumination equal to the direct illumination on a surface that is everywhere one meter from a uniform point source of one candle intensity or equal to one lumen per square meter called alsometer-candle
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

lux (lŭks)
n. pl. lux·es or lu·ces (l&oomacr;'sēz)
Abbr. lx
The International System unit of illumination, equal to one lumen per square meter. Also called candle-meter, meter-candle.

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
lux   (lŭks)  Pronunciation Key 
Plural luxes or luces (l'sēz)
A SI derived unit of illuminance in photometry, equal to one lumen per square meter.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Abbreviations & Acronyms
lux
luxurious
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia

lux

unit of illumination (see luminous intensity) in the International System of Units (SI). One lux (Latin for "light") is the amount of illumination provided when one lumen is evenly distributed over an area of one square metre. This is also equivalent to the illumination that would exist on a surface all points of which are one metre from a point source of one international candle (candela). One lux is equal to 0.0929 foot-candle.

Learn more about lux with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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