iron-oxide

iron oxide

noun Chemistry.
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ferric oxide

noun Chemistry.
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.
Also called iron oxide.


Origin:
1880–85

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Collins
World English Dictionary
ferric oxide
 
n
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: Fe2O3

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American Heritage
Science Dictionary
ferric oxide  
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: Fe2O3.
iron oxide  
Any of various oxides of iron, such as ferric oxide or ferrous oxide.
The American Heritage® Science Dictionary
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