(definition) by Webster 1913 Wed Dec 22 1999 at 3:59:36

Turn"bull's blue` (?). Chem.

The double cyanide of ferrous and ferric iron, a dark blue amorphous substance having a coppery luster, used in dyeing, calico printing, etc. Cf. Prussian blue, under Prussian.

 

© Webster 1913.

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