ferric oxide

American  

noun

Chemistry.

1. a dark-red, crystalline, water-insoluble solid, Fe 2 O 3 , occurring naturally, as hematite and rust, or synthesized: used chiefly as a pigment, as a mordant, as a coating for magnetic recording tape, and in the manufacture of polishing compounds.

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ferric oxide British  

noun

1. Systematic name: iron (III) oxide.  a red crystalline insoluble oxide of iron that occurs as haematite and rust and is made by heating ferrous sulphate: used as a pigment and metal polish ( jeweller's rouge ), and as a sensitive coating on magnetic tape. Formula: Fe 2 O 3

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ferric oxide Scientific  

1. A reddish-brown to silver or black compound which occurs naturally as the mineral hematite and as rust. It is often used as a pigment and a metal polish. Chemical formula: Fe ₂ O ₃ .

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Etymology

Origin of ferric oxide

First recorded in 1880–85

Example Sentences

His first major product was the development of a tape recorder: he heated ground iron in a frying pan to collect the ferric oxide he needed to make magnetic tape.

From New York Times • Feb. 28, 2011

In some species colouring matter or ferric oxide is stored in the capsule.

From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by Eyre, J. W. H. (John William Henry)

Examine pieces of the metal and also some of its compounds, as ferrous sulphate, ferric chloride, and ferric oxide or iron rust.

From Physiology and Hygiene for Secondary Schools by Walters, Francis M.

It consists of clear crystalline sapphire coloured with a small quantity of ferric oxide.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various

Iodine, antimony trichloride, molybdenum pentachloride, ferric chloride, ferric oxide, antimony, tin, stannic oxide and ferrous sulphate have all been used as chlorine carriers.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3 "Chitral" to "Cincinnati" by Various