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designating the acid now called hydrocyanic acid, but formerly called prussic acid, because Prussian blue is derived from it or its compounds. See Hydrocyanic.

Ferricyanic. [R.]

Ferrocyanic.

Pertaining to, derived from, or designating, a complex acid called nitroprussic acid, obtained indirectly by the action of nitric acid on potassium ferrocyanide (yellow prussiate), as a red crystalline unstable substance. It forms salts called nitroprussides, which give a rich purple color with alkaline subphides.…

m ferrocyanide), and chemically resembles hydrochloric and hydrobromic acids. Called also prussic acid, hydrogen cyanide, etc.

Laurel water, water distilled from the fresh leaves of the cherry laurel, and containing prussic acid and other products carried over in the process. American laurel, or Mountain laurel, Kalmia latifolia. See under Mountain. -- California laurel, Umbellularia Californica. -- Cherry laurel (in England called laurel).…

See Nitroprussic.

A salt of prussic acid; a cyanide. Red prussiate of potash. See Potassium ferricyanide, under Ferricyanide. Yellow prussiate of potash. See Potassium ferrocyanide, under Ferrocyanide.