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Webster 1913 Edition
Turnbull's blue
Turn′bull’s blueˊ
(tûrn′bụlz blūˊ)
. (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
.