viridian (adj.)youdaoicibaDictYouDict
1882, from the paint color name (1862), from Latin virid-, stem of viridis "green, blooming, vigorous" (see verdure) + -ian.
viridescentyoudaoicibaDictYouDict
"Greenish or becoming green", Mid 19th century: from late Latin viridescent- 'becoming green', from the verb viridescere, from Latin viridis 'green'.