UK /ˌlap.ɪs ˈlaz.jʊ.laɪ/ · US /ˌlæp.ɪs ˈlæz.(j)ə.li/
Etymology From Middle English lapis lazuli, from Medieval Latin lapis (“stone”) + lazulī, genitive singular of lazulum (“lapis lazuli, azure, the sky”), from Arabic لَازُوَرْد (lāzuward, “lapis lazuli, azure”), from Persian لاجورد (lâjvard). Compare azure, of the same origin.
1
Chemistry, Geography, Geology, Mineralogy, Natural sciences, Physical sciences A deep blue stone, used in making jewelry, and traditionally used to make the pigment ultramarine.
He saw the amber silk curtains wave to and fro: the middle window was open; in it stood a pillar of lapis lazuli, which supported an alabaster figure, Canova's Dansatrice.1832, Letitia Elizabeth Landon, Heath's Book of Beauty, 1833, The Talisman, page 66:
2
A deep, bright blue, like that of the stone.
lapis lazuli
adj
Etymology From Middle English lapis lazuli, from Medieval Latin lapis (“stone”) + lazulī, genitive singular of lazulum (“lapis lazuli, azure, the sky”), from Arabic لَازُوَرْد (lāzuward, “lapis lazuli, azure”), from Persian لاجورد (lâjvard). Compare azure, of the same origin.
1
Of a deep, bright blue, like that of the stone.
I cannot convey to you the sheer and surreal scale of everything: the towering ship, the ropes, the ties, the anchor, the pier, the vast lapis lazuli dome of the sky.1997, David Foster Wallace, “A Supposedly Fun Thing I'll Never Do Again”, in A Supposedly Fun Thing I'll Never Do Again, Kindle edition, Little, Brown Book Group: