luminosity

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lu|mi|nos|ity /l'uːmɪn'ɒsɪti/
1 [N-UNCOUNT]
The luminosity of a star or sun is how bright it is. (TECHNICAL)
For a few years its luminosity flared up to about 10,000 times the present-day luminosity of the Sun.
2 [N-UNCOUNT]
You can talk about the luminosity of someone's skin when it has a healthy glow.
Ultrafine powder with a rosy tinge gives the skin warmth and luminosity.

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