foot-candle

noun
foot-can·dle | \ˈfu̇t-ˈkan-dᵊl \

Definition of foot-candle 

: a unit of illuminance on a surface that is everywhere one foot from a uniform point source of light of one candle and equal to one lumen per square foot

First Known Use of foot-candle

1906, in the meaning defined above

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The first known use of foot-candle was in 1906

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footcandle

noun
foot·can·dle | \-ˈkan-dᵊl \

Medical Definition of footcandle 

: a unit of illuminance on a surface that is everywhere one foot from a uniform point source of light of one candle and equal to one lumen per square foot

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