This shows grade level based on the word's complexity.
illuminance
[ ih-loo-muh-nuhns ]
/ ɪˈlu mə nəns /
Save This Word!
This shows grade level based on the word's complexity.
noun Optics.
QUIZ
ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
Meet Grammar CoachImprove Your Writing
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. 2021
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.