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