Definitions for illuminanceɪˈlu mə nəns
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Random House Webster's College Dictionary
il•lu•mi•nanceɪˈlu mə nəns(n.)
Category: Optics
Ref: illumination (def. 6). 6
Origin of illuminance:
1940–45
Princeton's WordNet
illuminance, illumination(noun)
the luminous flux incident on a unit area
Wiktionary
illuminance(Noun)
The luminous flux incident on unit area of a surface; measured in lux or lumens
Citation
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"illuminance." Definitions.net. STANDS4 LLC, 2013. Web. 19 Jun 2013. <http://www.definitions.net/definition/illuminance>.