radiance 的詞源

約1600年，「輝煌的光，射出發散光線或光束的亮度」，來自radiant（形容詞），或來自中世紀拉丁語radiantia「亮度」，源自radiare「發光，閃耀」（參見radiation）。1761年起比喻用法，用於形容美麗、喜悅等。相關詞：Radiancy。

Radiance ... is generally a light that is agreeable to the eyes; hence the word is often chosen for corresponding figurative expressions: as, the radiance of his cheerfulness; the radiance of the gospel. Brilliance represents a light that is strong, often too strong to be agreeable, and marked by variation or play and penetration : as, the brilliance of a diamond or of fireworks. [Century Dictionary]

Radiance ... 通常是指眼睛愉悅的光；因此這個詞常被選用來對應比喻表達：如，他的愉快的radiance；福音的radiance。 Brilliance代表一種強烈的光，常常過於強烈而不愉悅，並且具有變化或遊戲和穿透性：如，鑽石或煙火的brilliance。[世紀詞典]