01 a. Situated or being beyond the sea.
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1.
Situated or being beyond the sea.
Entry
2 senses · 2 variants
Webster, 1913
Ultramarine
02 n. A blue pigment formerly obtained by powdering lapis lazuli, but now produced in large quantities by fusing together silica, alumina, soda, …
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1.
A blue pigment formerly obtained by powdering lapis lazuli, but now produced in large quantities by fusing together silica, alumina, soda, and sulphur, thus forming a glass, colored blue by the sodium polysulphides made in the fusion. Also used adjectively.(Chem.)
Phrases & compounds
Green ultramarine —
a green pigment obtained as a first product in the manufacture of ultramarine, into which it is changed by subsequent treatment.
Ultramarine ash —
a pigment which is the residuum of lapis lazuli after the ultramarine has been extracted. It was used by the old masters as a middle or neutral tint for flesh, skies, and draperies, being of a purer and tenderer gray than that produced by the mixture of more positive colors.