Prus"sian(?), a. [From Prussia, the country: cf. F. prussien.] Of or pertaining to Prussia. -- n. A native or inhabitant of Prussia.
(Chem.), any one of several complex double cyanides of ferrous and ferric iron; specifically, a dark blue amorphous substance having a coppery luster, obtained by adding a solution of potassium ferrocyanide (yellow prussiate of potash) to a ferric salt. It is used in dyeing, in ink, etc. Called also
insoluble Prussian blue,
Berlin blue, etc. --
(Zol.) See Gibel. --
(Chem.) Same as
Berlin green, under Berlin.
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