PRUSSIAN

prussian. Prussian, n. a native of Prussia; a. pertaining to it

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Prus″sian (?), a. [[From Prussia, the country: cf. F. prussien.]] Of or pertaining to Prussia. — n. A native or inhabitant of Prussia.
Prussian blue (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 Williamson's blue, insoluble Prussian blue, Berlin blue, etc. — Prussian carp (Zoöl.) See Gibel. — Prussian green. (Chem.) Same as Berlin green, under Berlin.