英语词源字典 - 在线词源网站

viridian (adj.)[viridian 词源字典]: 1882, from the paint color name (1862), from Latin virid-, stem of viridis "green, blooming, vigorous" (see verdure) + -ian.[viridian etymology, viridian origin, 英语词源]
viridescent: "Greenish or becoming green", Mid 19th century: from late Latin viridescent- 'becoming green', from the verb viridescere, from Latin viridis 'green'.