foot-lambert

Or foot·lam·bert

[foot-lam-bert]

noun

Optics.

1. 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. fL

foot-lambert

noun

1. ft-L. 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-lambert

Word History and Origins

Origin of foot-lambert¹

First recorded in 1920–25

Example Sentences

If you don't know what a foot-lambert is, join the crowd.

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