- luminance(def 2).
- the quality of being intellectually brilliant, enlightened, inspired, etc.: The luminosity of his poetry is unequaled.
- something luminous.
- Astronomy. the brightness of a star in comparison with that of the sun: the luminosity of Sirius expressed as 23 indicates an intrinsic brightness 23 times as great as that of the sun.
- Also called luminosity factor. Optics. the brightness of a light source of a certain wavelength as it appears to the eye, measured as the ratio of luminous flux to radiant flux at that wavelength.
Origin of luminosity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for luminosity
Nikos Kazantzakis had no problems writing a moving novel of beauty, profundity, and luminosity.Examining the Many Novels on Jesus Christ
December 24, 2012
It is the radiations of light which they throw off; it is their luminosity—their transparency.Sex=The Unknown Quantity
There was luminosity where the ships had encountered each other.The Aliens
Value or luminosity of colors ranges between these two extremes.A Color Notation
Albert H. Munsell
But this luminosity is not entirely confined to the minute creatures of the sea.The Ocean and its Wonders
He nodded toward the circular area of luminosity on the sea.Creatures of the Abyss
- the condition of being luminous
- something that is luminous
- astronomy a measure of the radiant power emitted by a star
- physics the attribute of an object or colour enabling the extent to which an object emits light to be observedFormer name: brightness See also colour
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
Word Origin and History for luminosity
Online Etymology Dictionary, © 2010 Douglas Harper