Prussian

(prŭsh'an, or prōo'shan) (Synop., § 130), a. [From Prussia; Fr. Prussien, It. Prussiano.] (Geog.) Of, or pertaining to, Prussia.

Prussian blue (Chem.), cyanide of potassium and iron. This salt is of a beautiful deep blue, and is much used as a pigment. It is also used in medicine.

(prŭsh'an, or prōō'shan), n. (Geog.) A native or inhabitant of Prussia.