luminosity
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)

New Collegiate Dictionary. 2001.

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  • Luminosity — has different meanings in several different fields of science.In photometry and color imagingIn photometry, luminosity is sometimes incorrectly used to refer to luminance, which is the density of luminous intensity in a given direction. The SI… …   Wikipedia

  • Luminosity — Lu mi*nos i*ty, n. The quality or state of being luminous; luminousness. [1913 Webster] …   The Collaborative International Dictionary of English

  • luminosity — (n.) 1630s, quality of being luminous, from Fr. luminosité or else a native formation from LUMINOUS (Cf. luminous) + ITY (Cf. ity). In astronomy, intrinsic brightness of a heavenly body (as distinguished from apparent magnitude, which diminishes… …   Etymology dictionary

  • luminosity — ► NOUN ▪ luminous quality …   English terms dictionary

  • luminosity — [lo͞o΄mənäs′ə tē] n. [ML luminositas] 1. the quality or condition of being luminous 2. pl. luminosities something luminous 3. brightness …   English World dictionary

  • luminosity — [[t]lu͟ːmɪnɒ̱sɪti[/t]] 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… …   English dictionary

  • luminosity — /looh meuh nos i tee/, n., pl. luminosities. 1. luminance (def. 2). 2. the quality of being intellectually brilliant, enlightened, inspired, etc.: The luminosity of his poetry is unequaled. 3. something luminous. 4. Astron. the brightness of a… …   Universalium

  • luminosity — noun a) the state of being luminous, or a luminous object; brilliance or radiance b) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor …   Wiktionary

  • luminosity — skaistis statusas T sritis chemija apibrėžtis Šviečiančio ar šviesą sklaidančio paviršiaus šviesos ryškumas tam tikra kryptimi (Cd/m²). atitikmenys: angl. brightness; luminance; luminosity rus. яркость …   Chemijos terminų aiškinamasis žodynas

  • luminosity — skaistis statusas T sritis fizika atitikmenys: angl. brightness; luminance; luminosity vok. Helligkeit, f; Leuchtdichte, f rus. яркость, f pranc. brillance, f; luminance, f …   Fizikos terminų žodynas

  • luminosity — skaistis statusas T sritis ekologija ir aplinkotyra apibrėžtis Medžiagos skaidrumą apibūdinantis dydis, lygus spinduliuotės srauto, kritimo kryptimi perėjusio per vienetinio storio medžiagos sluoksnį, ir į tą medžiagą kritusio srauto dalmeniui.… …   Ekologijos terminų aiškinamasis žodynas

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