| a. | 1. | Situated or being beyond the sea. | ||||||
| n. | 1. | (Chem.) 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.
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| Noun | 1. | ultramarine - blue pigment made of powdered lapis lazuli Synonyms: ultramarine blue |
| 2. | ultramarine - vivid blue to purple-blue | |
| Adj. | 1. | ultramarine - of a brilliant pure blue to purplish blue color |