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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. A blue pigment made from powdered lapis lazuli.
  2. n. A similar pigment made synthetically by heating clay, sodium carbonate, and sulfur together.
  3. n. A vivid or strong blue to purplish blue.
  4. adj. Of the color ultramarine.
  5. adj. Of or from a place beyond the sea.

Century Dictionary and Cyclopedia

  1. n. A beautiful natural blue pigment, obtained from the mineral lapis lazuli, a variety of haüyne. This stone occurs in Siberia, Persia, Tibet, and some other localities. (See lapis lazuli, under lapis.) Small golden specks of iron pyrites are usually scattered through it. To prepare the pigment, selected pieces are heated, and cooled in water, producing disintegration. The powder is then purified by repeated washings, the several wash-waters depositing pigments of different depths of color, the gray powder known as ultramarine ash being the last and least valuable product. Ultramarine is very permanent under all conditions, and is, in color, the purest blue available. Its use is limited, however, by its great cost, and also by the fact that artificial ultramarine is practically as valuable. The color of both natural and artificial ultramarine is a rather dark and intensely chromatic violet blue. The natural ultramarine is only slightly violet, the artificial is very much so. Also called lazulite-blue.
  2. n. Azure-stone.
  3. Situated or being beyond the sea.

Wiktionary

  1. n. a brilliant blue pigment that is either extracted from mineral deposits or made synthetically.
  2. n. colour a brilliant pure dark blue or slightly purplish colour.
  3. adj. having a brilliant blue colour.

GNU Webster's 1913

  1. adj. Situated or being beyond the sea.
  2. n. (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.

WordNet 3.0

  1. n. blue pigment made of powdered lapis lazuli
  2. n. a vivid blue to purple-blue color
  3. adj. of a brilliant pure blue to purplish blue color

Etymologies

  1. From Medieval Latin ultrāmarīnus, from beyond the sea : Latin ultrā, ultra- + Latin marīnus, of the sea (from mare, sea; see mori- in Indo-European roots). (American Heritage® Dictionary of the English Language, Fourth Edition)

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‘ultramarine’ has been looked up 2167 times, loved by 1 person, added to 42 lists, and has a Scrabble score of 13.