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Prussian blue

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noun
  1. a moderate to deep greenish blue.
  2. one of the iron blues, a dark-blue, crystalline, water-insoluble pigment, Fe4[Fe(CN)6]3, produced by reacting ferrocyanic acid or a ferrocyanide with a ferric compound: used in painting, fabric printing, and laundry bluing.
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Origin of Prussian blue

1715–25; translation of French bleu de Prusse, so called because it was discovered and first reported in Berlin, capital of Prussia
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for prussian blue

Prussian blue

noun
  1. any of a number of blue pigments containing ferrocyanide or ferricyanide complexes
    1. the blue or deep greenish-blue colour of this pigment
    2. (as adjective)a Prussian-blue carpet
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

prussian blue in Medicine

Prussian blue

(prŭshən)