Relating to or containing both cobalt and cyanide groups in a chemical compound.
From cobalt + cyanic (relating to cyanide compounds). Cyanic itself comes from Greek kyanos meaning 'blue,' because cyanide compounds are often brilliantly colored.
Prussian blue, the first synthetic pigment ever made, is a cobaltocyanic compound—it revolutionized art and painting because it was cheaper than natural ultramarine made from crushed lapis lazuli!
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