ferri-
(ˈfɛrɪ)
formerly ferrid-, used in Organic Chemistry in the names of certain compounds to indicate the presence of iron in the ‘ferric’ state (cf. ferro-, the corresponding prefix used when the iron is in the ‘ferrous’ state). ferricyanˈhydric or ferricyˈanic acid, an acid, H4FeCy6, procured from various ferricyanides, and crystallizing in lustrous brownish-green needles. ferriˈcyanide, a salt of ferricyanhydric acid, e.g. potassium ferricyanide, red prussiate of potash; ferrous ferricyanide, Turnbull's blue. ferricyˈanogen, the hypothetical radical FeCy2 supposed to exist in ferricyanhydric acid.
| 1845 G. E. Day tr. Simon's Anim. Chem. I. 16 Ferrocyanide and ferridcyanide of potassium. 1848 Craig, Ferridcyanogen. 1854 J. Scoffern in Orr's Circ. Sc. Chem. 443 A..hydracid, ferrosesquicyanic acid, or ferridcyanic acid. 1869 Roscoe Elem. Chem. 377 Ferricyanic Acid. 1878 Kingzett Anim. Chem. 379 Potassic ferro- and ferri-cyanide. |