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foot-lambert
or foot·lam·bert
[ foot-lam-bert ]
/ ˈfʊtˌlæm bərt /
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noun Optics.
a unit of luminance or photometric brightness, equal to the luminance of a surface emitting a luminous flux of one lumen per square foot, the luminance of a perfectly reflecting surface receiving an illumination of one foot-candle. Abbreviation: fL
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Origin of foot-lambert
First recorded in 1920–25
Words nearby foot-lambert
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use foot-lambert in a sentence
British Dictionary definitions for foot-lambert
foot-lambert
noun
a former unit of luminance equal to the luminance of a surface emitting or reflecting 1 lumen per square foot. A completely reflecting surface illuminated by 1 foot-candle has a luminance of 1 foot-lambertAbbreviation: ft-L
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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