luminosity

== English == === Etymology === Borrowed from French luminosité or else a native formation from luminous +‎ -ity. === Pronunciation === Rhymes: -ɒsɪti === Noun === luminosity (countable and uncountable, plural luminosities) (uncountable) the state of being luminous, or a luminous object; brilliance or radiance (physics) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor (astronomy) The rate at which a star radiates energy in all directions. ==== Derived terms ==== ==== Translations ==== === References === === Further reading === luminosity on Wikipedia.Wikipedia