luminosity
/ˌljuːmɪˈnɒsətɪ/noun
(pl. -ies)［mass noun］
1- luminous quality亮度：
acrylic colours retain freshness and luminosity.
丙烯酸颜料能保持新鲜和明亮。
1.1
- Astronomy the intrinsic brightness of a celestial object (as distinct from its apparent brightness diminished by distance)【天文】光度。
1.2
- Physics the rate of emission of radiation, visible or otherwise【物理】光度。