• WordNet 3.6
    • n luminosity the quality of being luminous; emitting or reflecting light "its luminosity is measured relative to that of our sun"
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Webster's Revised Unabridged Dictionary
    • n Luminosity The quality or state of being luminous; luminousness.
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Century Dictionary and Cyclopedia
    • n luminosity The quality of being luminous or bright; luminousness; the radiation or reflection of light.
    • n luminosity Specifically, the intensity of light in a color, measured photometrically. That is to say, a standard light has its intensity, or vis viva, altered until it produces the impression of being equally bright with the color whose luminosity is to be determined; and the measure of the vis viva of the altered light relatively to its standard intensity is then taken as the luminosity of the color in question.
    • n luminosity In botany, phosphorescence.
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In literature:

A Manx or Erse term for the luminosity of the sea.
"The Sailor's Word-Book" by William Henry Smyth
Value or luminosity of colors ranges between these two extremes.
"A Color Notation" by Albert H. Munsell
The luminosity is often so bright that when brought near a printed page in the dark, words can be read.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
I restore to the rays themselves the luminosity which they lost in their passage through our atmosphere.
"The Crack of Doom" by Robert Cromie
I could not explain the luminosity of the water.
"An Explorer's Adventures in Tibet" by A. Henry Savage Landor
The luminosity comes from the cluster of eggs forced out of the ovary.
"The Glow-Worm and Other Beetles" by Jean Henri Fabre
Castor is doubtless a more massive orb than our Sun, and possesses a higher degree of luminosity.
"The Astronomy of Milton's 'Paradise Lost'" by Thomas Orchard
And now a faint luminosity was beginning to penetrate that infernal darkness.
"Astounding Stories of Super-Science February 1930" by Various
Sirius has only twice the mass, but ten thousand times the luminosity, of its strange companion!
"Pleasures of the telescope" by Garrett Serviss
There are no phenomena associated with fungi that are of greater interest than those which relate to luminosity.
"Fungi: Their Nature and Uses" by Mordecai Cubitt Cooke

In news:

This new discovery suggests major revisions to concepts of disk structure and luminosity.
Even in pictures, her eyes sparkle, a complicated luminosity far more complex than merely being a pretty woman.
Par, Bay maximize luminosity in 2000 RealD theaters with enhanced digital prints.
Robin recs trailers for ' Luminosity ,' 'Where It Began'.
Luminosity upgrades fan video.
Wool is known for its durability, luminosity, and the way it absorbs and flaunts color.
Prestige Variable CM, one of several pleasantly stout fiber-based papers manufactured in France by Bergger, has a richness and luminosity that has almost become a thing of the past.
The rich red shade's luminosity gives it a classic—not retro—look.
While many Cedar Point fans are hoping a new ride will be placed in WildCat 's small location, Zelm says its spot will most likely be used to include extra seating for the Luminosity show.

In science:

In order for the IACN model to successfully describe the DCXSs, the predicted X-ray luminosity must naturally span the range of the observed luminosities.
Bondi-Hoyle-Lyttleton Accretion Model for Low-luminosity X-ray Sources in Globular Clusters
There is no obvious trend for a cutoff at high luminosity for the more quiescent galaxies, suggesting a universal luminosity function is a reasonable approximation.
The Formation of Star Clusters
The dotted line shows the trend expected if there is a universal luminosity function with α = -2 and the increase in the luminosity is simply due to a larger sample of clusters (i.e., the slope is -2.5).
The Formation of Star Clusters
Ltot is the total luminosity and L is the fluctuation luminosity (the luminosity-weighted mean stellar luminosity).
A Synthesis of Data from Fundamental Plane and Surface Brightness Fluctuation Surveys
Therefore we computed the time-averaged luminosity during these phases of evolution, and assigned this luminosity to each evolving star (i.e. post-main sequence but non-degenerate stars).
A Simple Dynamical Model for Omega Cen