from
The Collaborative International Dictionary of English v.0.48
Prussian \Prus"sian\, a. [From Prussia, the country: cf. F.
prussien.]
Of or pertaining to Prussia. -- n. A native or inhabitant of
Prussia.
[1913 Webster]
{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}.
[1913 Webster]