View synonyms for luminosity


[ loo-muh-nos-i-tee ]


, plural lu·mi·nos·i·ties.
  1. the quality of being intellectually brilliant, enlightened, inspired, etc.:

    The luminosity of his poetry is unequaled.

  2. something luminous.
  3. 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.
  4. Also called luminosity factor. 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.


/ ˌluːmɪˈnɒsɪtɪ /


  1. the condition of being luminous
  2. something that is luminous
  3. astronomy a measure of the radiant power emitted by a star
  4. physics the attribute of an object or colour enabling the extent to which an object emits light to be observed Former namebrightness See also colour

Discover More

Other Words From

  • nonlu·mi·nosi·ty noun
  • self-lumi·nosi·ty noun
Discover More

Word History and Origins

Origin of luminosity1

1625–35; < Latin lūminōs ( us ) luminous + -ity
Discover More

Example Sentences

In a cathedral, I can get a feeling of luminosity out of the numinous.

Maybe—maybe—some people might have seen a fluorescent luminosity in the original pigments.

I wanted to write fiction, which was what Barry was reading, and he had wrapped me in sentences like cords of luminosity.

The first rung consists of “standard candle” stars in and around our own galaxy that have well-defined luminosities, and which are close enough to exhibit parallax — the only sure way to tell how far away things are without traveling there.

It basically breaks our understanding of the luminosities and brightnesses that kilonovae are supposed to have.

These sculptures are in his typical style—figures molded out of colorful stainless steel with striking luminosity.

Nikos Kazantzakis had no problems writing a moving novel of beauty, profundity, and luminosity.

So the plan as of a few years ago in the back of people's minds was to go to a higher luminosity.

Our fellows were being hard beset to hold on to what they had won; there, where the horizon stood out with spectral luminosity.

The night grows dark, the wind rises and is cold, and the tide changes; so does the luminosity of the sea.

Other naturalists who have had opportunities of seeing the insect in its native regions strongly deny its luminosity.

The ideal method looks to the use of a very rich gas, and the burning of it with a maximum of luminosity.

Recently an extraordinary instance of luminosity was recorded as occurring in our own country.





luminophoreluminosity class