[fer-uh s] /ˈfɛr əs/
of or containing iron, especially in the bivalent state.
of or containing iron in the divalent state; designating an iron (II) compound
“pertaining to or containing iron,” 1865, from Latin ferreus “made of iron,” from ferrum “iron” (see ferro-). In chemistry, “containing iron,” especially with a valence of two.
ferrous fer·rous (fěr’əs)
Of, relating to, or containing iron, especially with a valence of 2 or a valence lower than in a corresponding ferric compound.
Containing iron, especially iron with a valence of 2. Compare ferric.
noun, Chemistry. 1. a black powder, FeO, insoluble in water, soluble in acid. ferrous oxide A black powder used to make steel, green heat-absorbing glass, and enamels. Chemical formula: FeO.
noun, Chemistry, Pharmacology. 1. a bluish-green, crystalline, saline-tasting, water-soluble heptahydrated solid, FeSO 4 ⋅7H 2 O, used chiefly in the manufacture of other iron salts, in water purification, fertilizer, inks, pigments, tanning, photography, and in medicine in the treatment of anemia. ferrous sulfate A bluish-green crystalline compound that is used in sewage and water treatment, […]
noun, Chemistry. 1. a dark or black metallic crystalline compound, FeS, insoluble in water, soluble in acids, used in ceramics and to generate hydrogen sulfide.
[fer-oh-vuh-ney-dee-uh m] /ˌfɛr oʊ vəˈneɪ di əm/ noun 1. a ferroalloy containing up to 55 percent .