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lambert - 7 dictionary results

lam⋅bert

  [lam-bert]
Use lambert in a Sentence
–noun Optics.
the centimeter-gram-second unit of luminance or brightness, equivalent to 0.32 candles per square centimeter, and equal to the brightness of a perfectly diffusing surface emitting or reflecting one lumen per square centimeter. Abbreviation: L
Origin:
1910–15; named after J. H. Lambert

Lam⋅bert

  [lam-bert; for 2 also Ger. lahm-bert]
–noun
1. Con⋅stant  [kon-stuhnt] , 1905–51, English composer and conductor.
2. Jo⋅hann Hein⋅rich  [yoh-hahn hahyn-rikh] , 1728–77, German scientist and mathematician.
3. a male given name: from Germanic words meaning “land” and “bright.”
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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lam·bert   (lām'bərt)   
n.   Abbr. L
The unit of brightness in the centimeter-gram-second system, equivalent to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter.

[After Johann Heinrich Lambert (1728-1777), German physicist and astronomer.]
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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Lambert 
masc. proper name, from Fr., from Ger. Lambert, from O.H.G. Lambreht, from lant "land" + beraht "bright." O.E. cognate was Landbeorht. The popularity of the name from 12c. is probably due to immigration from Flanders, where St. Lambert of Maestricht was highly venerated. Attested as a surname from 1142.
Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: lam·bert
Pronunciation: 'lam-b&rt
Function: noun
: the centimeter-gram-second unit of brightness equal to the brightness of aperfectly diffusing surface that radiates or reflects one lumen per square centimeter
Lamábert /'läm-"bert,/ Johann Heinrich (1728–1777), Germanmathematician, physicist, and philosopher. Largely self-educated, Lambert investigated geometry and astronomy, doing so by means of instruments which he himself designed and built. He also madesignificant contributions to the knowledge of heat and light. In 1760 he demonstrated for the first time how to measure quantitatively the intensity of light. The cgs unit of measurement for lightintensity, the lambert, is named in his honor.
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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lambert   (lām'bərt)  Pronunciation Key 
A unit of luminance in the centimeter-gram-second system, equivalent to the luminance of a perfectly diffusing surface that emits or reflects one lumen per square centimeter. The lambert is named after the Swiss mathematician and physicist Johann Heinrich Lambert (1728-1777).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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lambert

unit of luminance (brightness) in the centimetre-gram-second system of physical measurement. (See the International System of Units.) It is defined as the brightness of a perfectly diffusing surface that radiates or reflects one lumen per square centimetre. The unit was named for the 18th-century German physicist Johann Heinrich Lambert. It is used by astronomers as well as by physicists, engineers, and photographers.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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