Prussian blue

noun

Prus·​sian blue ˈprə-shən- How to pronounce Prussian blue (audio)
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

Word History

Etymology

Prussia, Germany

First Known Use

1724, in the meaning defined at sense 1

Time Traveler
The first known use of Prussian blue was in 1724

Dictionary Entries Near Prussian blue

Cite this Entry

“Prussian blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Prussian%20blue. Accessed 31 Jan. 2023.

Medical Definition

Prussian blue

noun
Prus·​sian blue ˈprəsh-ən-ˈblü How to pronounce Prussian blue (audio)
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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