Prus"sian (?), a. [From Prussia, the country: cf. F. prussien.]
Of or pertaining to Prussia.
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 Zool. See Gibel. -- Prussian green. Chem. Same as Berlin green, under Berlin.
© Webster 1913.