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ron; -- especially used of compounds of iron in which the iron has its lower valence; as, ferrous sulphate.

Bearing or producing berries; bacciferous; as, cocciferrous trees or plants.

medicine, etc. It is made on a large scale by the oxidation of iron pyrites. Called also ferrous sulphate.

A cruciferrous plant (Hesperis matronalis), remarkable for its fragrance, especially toward the close of the day; -- called also rocket and dame's violet. Loudon.

ifically (Chem.), denoting those compounds in which iron has a higher valence than in the ferrous compounds; as, ferric oxide; ferric acid. Ferric acid (Chem.), an acid, H2FeO4, which is not known in the free state, but forms definite salts, analogous to the chromates and sulphates. -- Ferric oxide (Chem.), sesquioxid…

e2, consisting of the double cyanide of potassium and ferric iron. From it is derived the ferrous ferricyanate, Turnbull's blue.

A prefix, or combining form, indicating ferrous iron as an ingredient; as, ferrocyanide.

One of a series of complex double cyanides of ferrous iron and some other base. Potassium ferrocyanide (Chem.), yellow prussiate of potash; a tough, yellow, crystalline salt, K4(CN)6Fe, the starting point in the manufacture of almost all cyanogen compounds, and the basis of the ferric ferrocyanate, prussian blue. It is…

Pertaining to, or containing, or obtained from, hydrogen, ferrous iron, and cyanogen; as, hydroferrocyanic acid. See Ferrocyanic.

habitant 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, e…

to combine with, or to subject to the action of, hydrogen; as, ferric iron is reduced to ferrous iron; or metals are reduced from their ores; -- opposed to Ant: oxidize.

hemical name of tin being Jove. -- Sal Martis Etym: [NL.] (Old Chem.), green vitriol, or ferrous sulphate; -- the alchemical name of iron being. Mars. -- Sal microcosmicum Etym: [NL.] (Old Chem.) See Microcosmic salt, under Microcosmic. -- Sal plumbi Etym: [NL.] (Old Chem.), sugar of lead. -- Sal prunella. (Old Che…

The double cyanide of ferrous and ferric iron, a dark blue amorphous substance having a coppery luster, used in dyeing, calico printing, etc. Cf. Prussian blue, under Prussian.

lphuric acid, under Sulphuric. [Colloq.] Blue vitriol. See under Blue. -- Green vitriol, ferrous sulphate; copperas. See under Green. -- Oil of vitriol, sulphuric or vitriolic acid; -- popularly so called because it has the consistency of oil. -- Red vitriol, a native sulphate of cobalt. -- Vitriol of Mars, ferric…