luminance
Use Luminance in a sentence
mə noun
1.
the state or quality of being luminous.
2.
Also called luminosity. the quality or condition of radiating or reflecting light: the blinding luminance of the sun.
3.
Optics. the quantitative measure of brightness of a light source or an illuminated surface, equal to luminous flux per unit solid angle emitted per unit projected area of the source or surface.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To luminance
Collins
World English Dictionary
luminance (ˈluːmɪnəns) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| 1. | a state or quality of radiating or reflecting light |
| 2. | L a measure (in candelas per square metre) of the brightness of a point on a surface that is radiating or reflecting light. It is the luminous intensity in a given direction of a small element of surface area divided by the orthogonal projection of this area onto a plane at right angles to the direction |
| [C19: from Latin lūmen light] | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Luminance
is always a great word to know.
So is ort. Does it mean:
| a chattering or flighty, light-headed person. |
| a scrap or morsel of food left at a meal. |
Etymonline
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
luminance (l 'mə-nəns) Pronunciation Key
The luminous intensity of a light source per unit area. Occasionally the lambert unit is used to measure luminance. Also called photometric brightness. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The flashlight highlighted the anemone's dazzling luminance, while the setting sun added a sense of atmosphere.
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