ferrous oxide

American  

noun

Chemistry.

1. a black powder, FeO, insoluble in water, soluble in acid.

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ferrous oxide Scientific  

1. A black powder used to make steel, green heat-absorbing glass, and enamels. Chemical formula: FeO.

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Etymology

Origin of ferrous oxide

First recorded in 1870–75

Example Sentences

Amused and enchanted, I named him "Ferrous" for the chemical name of rust, hydrated ferrous oxide.

From New York Times • Feb. 13, 2018

A little more, and I won't know whether I'm a nitrous sulphide or a ferrous oxide of bromo seltzer.

From Torchy, Private Sec. by Lincoln, F. Foster

Ferrous Oxide.—When a qualitative test shows both ferric and ferrous oxide to be present, the proportion of the ferrous oxide must be separately determined.

From A Text-book of Assaying: For the Use of Those Connected with Mines. by Beringer, Cornelius

Manganese dioxide not only acts as a source of oxygen, but develops a pink tint in the glass, which is complementary to and neutralizes the green colour due to ferrous oxide.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" by Various

In the variety known as nemalite the structure is finely fibrous and the lustre silky: this variety contains 5 to 8% of ferrous oxide replacing magnesia, and has consequently a rather higher specific gravity, viz.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various