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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. Any of various blue dyes, used to sensitize photographic emulsions to a greater range of light.

Century Dictionary and Cyclopedia

  1. n. The blue coloring matter of certain flowers, as the corn-flower, violet, and species of iris.
  2. n. In chem., a beautiful blue dye, chinoline blue, prepared by acting on a mixture of chinoline and lepidine with amyl iodide. Unfortunately it does not resist the action of light, and hence has lost its importance as a dyestuff, but, it is used in making orthochromatic plates for photography.

Wiktionary

  1. n. Any of a family of synthetic blue dyes used in photography etc.

GNU Webster's 1913

  1. n. (Chem.) One of a series of artificial blue or red dyes obtained from quinoline and lepidine and used in calico printing.

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‘cyanine’ has been looked up 651 times, loved by 1 person, added to 2 lists, and has a Scrabble score of 12.