First Known Use: 1724
Dictionary
Prussian blue
noun 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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Origin of PRUSSIAN BLUE
Prussia, Germany
Medical Dictionary
Prussian blue
noun Prus·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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