illuminance
[ ih-loo-muh-nuh ns ]
/ ɪˈlu mə nəns /
noun Optics.
Origin of illuminance
First recorded in 1940–45;
illumin(ate) +
-ance
Words nearby illuminance
illogical,
illogicality,
illude,
illume,
illuminable,
illuminance,
illuminant,
illuminate,
illuminati,
illuminating,
illumination
British Dictionary definitions for illuminance
illuminance
/ (ɪˈluːmɪnəns) /
noun
the luminous flux incident on unit area of a surface. It is measured in lux
Symbol: E v Sometimes called: illumination Compare irradiance
Scientific definitions for illuminance
illuminance
[ ĭ-lōō′mə-nəns ]
The luminous flux per unit area at any point on a surface exposed to incident light. It is measured in luxes. Also called illumination