Prus·sian blue | \ ˈprə-shən- 
\
\Definition of Prussian blue
1 : any of numerous blue iron pigments formerly regarded as ferric ferrocyanide
2 : a dark blue crystalline hydrated ferric ferrocyanide Fe4[Fe(CN)6]3·xH2O used as a test for ferric iron
3 : a greenish blue
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More Definitions for Prussian blue
Prussian blue
nounPrus·sian blue | \ ˈprəsh-ən-ˈblü \
\Medical Definition of Prussian blue
1 : any of numerous blue iron pigments formerly regarded as the ferric salt of ferrocyanide
2 : a dark blue crystalline hydrated compound Fe4[Fe(CN)6]3·xH2O that is a ferrocyanide of iron and is used as a test for ferric iron
— called also ferric ferrocyanide
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Time Traveler for Prussian blue
The first known use of Prussian blue was in 1724
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