noun (plural -ties) Date: 1634 1. the quality or state of being luminous, something luminous, 2. the relative quantity of light, relative brightness of something, the relative quantity of radiation emitted by a celestial source (as a star)
LUMINOSITY
Meaning of LUMINOSITY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012