lambert

lambert

[lam-bert]
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

Dictionary.com Unabridged

Lambert

[lam-bert; for 2 also German lahm-bert]
noun
1.
Constant [kon-stuhnt] , 1905–51, English composer and conductor.
2.
Johann Heinrich [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. 2014.
Cite This Source Link To Lambert
Collins
World English Dictionary
lambert (ˈlæmbət)
 
n
L the cgs unit of illumination, equal to 1 lumen per square centimetre
 
[named after J. H. Lambert (1728--77), German mathematician and physicist]

Lambert (ˈlæmbət)
 
n
Constant. 1905--51, English composer and conductor. His works include much ballet music and The Rio Grande (1929), a work for chorus, orchestra, and piano, using jazz idioms

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

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, © 2010 Douglas Harper
Cite This Source
American Heritage
Science Dictionary
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.
Cite This Source
Encyclopedia Britannica
Encyclopedia

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.

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

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature