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Cyan-ide
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For more on marking an answer as the "Best Answer", please visit our FAQ.You are right. The Greek word "kuan(e)os" means deep blue. Cyanide is a salt of hydrocyanic acid, containing the group CN or the ion CN- (in Organic Chemistry a NITRILE). It is a powerful poison. The sodium, calcium, or other salts are used to extract gold, silver, or other metals from their ores. It is deep blue in colour.
Other words using this prefix include: cyanophyte = a blue-green algae; cyanometer = an instrument for measuring the blueness of the sky; and cyanolabe = a blue- sensitive pigment in the cones of the retina.
You are right there is a connection with the colour but I just can't find it at the moment.
Hope you enjoyed Glastonbury and didn't get too wet.
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