luminousness

英['luːmɪnəsnɪs] 美['luːmɪnəsnɪs]
  • n.透光率
  • brightness n.光亮;明亮;聪明
  • level n.数量;等级;水平;水平线adj.平的;等高的v.弄平;夷平;对准adv.水平地
Noun:
  1. the quality of being luminous; emitting or reflecting light;

    "its luminosity is measured relative to that of our sun"