illuminance
[ ih-loo-muh-nuhns ]
/ ɪˈlu mə nəns /
noun Optics.
QUIZZES
CAN YOU GUESS THESE WORDS FROM AROUND THE US?
American English is not always as it appears to be ... get to know regional words in this quiz!
Question 1 of 10
A bet is synonymous with a wager, but what does it mean in New York?
Origin of illuminance
First recorded in 1940–45; illumin(ate) + -ance
Words nearby illuminance
ill-timed, ill-treat, illude, illume, illuminable, illuminance, illuminant, illuminate, illuminati, illuminating, illumination
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for illuminance
illuminance
/ (ɪˈluːmɪnəns) /
noun
the luminous flux incident on unit area of a surface. It is measured in luxSymbol: E v Sometimes called: illumination Compare irradiance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.