I. ˈsiˌstēn sometimes sə̇ˈstēn, chiefly Brit ˈsiˌstīn adjective
or six·tine ˈsikˌstīn, -ˌstēn, -_stə̇n
Usage: usually capitalized
Etymology: sistine from Italian sistino, from New Latin sixtinus, from Latin sextus sixth + -inus -ine; sixtine from New Latin sixtinus — more at sext
1. : of or relating to any of the popes named Sixtus
the Sistine edition of the Vulgate
2.
[so called from its having been built by Pope Sixtus IV died 1484]
: of or relating to the Sistine chapel in the Vatican
the Sistine choir
II. noun
Usage: often capitalized
Etymology: after the Sistine chapel in the Vatican, noted for its famous paintings especially the frescoes on its ceilings painted by Michelangelo Buonarroti died 1564 Italian sculptor, painter, architect, and poet of the High Renaissance
: a pale blue that is redder and deeper than average powder blue, greener and stronger than average cadet gray, redder and stronger than old blue, and greener and darker than average Wedgwood blue (sense 1)