Adjacent Words

luminosity definitions

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WordNet (r) 3.0 (2005)

n
1: the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" [syn: luminosity, brightness, brightness level, luminance, luminousness, light]

Merriam Webster's

noun (plural -ties) Date: 1634 1. a. the quality or state of being luminous b. something luminous 2. a. the relative quantity of light b. relative brightness of something 3. the relative quantity of radiation emitted by a celestial source (as a star)

Webster's 1913 Dictionary

Luminosity Lu`mi*nos"i*ty, n. The quality or state of being luminous; luminousness.

Collin's Cobuild Dictionary

1. 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. 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.