luminance

[ loo-muh-nuhns ]

/ ˈlu mə nəns /

SEE SYNONYMS FOR luminance ON THESAURUS.COM

noun

the state or quality of being luminous.

Also called luminosity. the quality or condition of radiating or reflecting light: the blinding luminance of the sun.

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.

Origin of luminance

1875–80; <Latin lūmin- (stem of lūmen) light + -ance

Words nearby luminance

lum-hat, Lumholtz's kangaroo, Lumière, Luminaire, Luminal, luminance, luminaria, luminary, lumine, luminesce, luminescence

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for luminance

The remainder of the big room receded into a grey twilight encircling the patch of luminance.
The Lamp of Fate|Margaret Pedler
A luminance seemed to come from above, from the unseen heights of the magnificent double staircase.
Helen with the High Hand (2nd ed.)|Arnold Bennett
A few fluoros cast wan puddles of luminance on the plastic flooring.
The Sensitive Man|Poul William Anderson

British Dictionary definitions for luminance

luminance

/ (ˈluːmɪnəns) /

noun

a state or quality of radiating or reflecting light

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 directionSymbol: L

Word Origin for luminance

C19: from Latin lūmen light

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 luminance

luminance

[ lōō′mə-nəns ]

The luminous intensity of a light source per unit area. Occasionally the lambert unit is used to measure luminance. Also called photometric brightness

单词	luminance
释义	luminance [ loo-muh-nuhns ] / ˈlu mə nəns / SEE SYNONYMS FOR luminance ON THESAURUS.COM noun the state or quality of being luminous. Also called luminosity. the quality or condition of radiating or reflecting light: the blinding luminance of the sun. 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. Origin of luminance 1875–80; <Latin lūmin- (stem of lūmen) light + -ance Words nearby luminance lum-hat, Lumholtz's kangaroo, Lumière, Luminaire, Luminal, luminance, luminaria, luminary, lumine, luminesce, luminescence Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for luminance The remainder of the big room receded into a grey twilight encircling the patch of luminance. The Lamp of Fate\|Margaret Pedler A luminance seemed to come from above, from the unseen heights of the magnificent double staircase. Helen with the High Hand (2nd ed.)\|Arnold Bennett A few fluoros cast wan puddles of luminance on the plastic flooring. The Sensitive Man\|Poul William Anderson British Dictionary definitions for luminance luminance / (ˈluːmɪnəns) / noun a state or quality of radiating or reflecting light 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 directionSymbol: L Word Origin for luminance C19: from Latin lūmen light 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 Words related to luminance light, glow, brightness, fluorescence Scientific definitions for luminance luminance [ lōō′mə-nəns ] 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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luminance

noun

Origin of luminance

Words nearby luminance

Example sentences from the Web for luminance

British Dictionary definitions for luminance

noun

Word Origin for luminance

Words related to luminance

Scientific definitions for luminance