One of the mysteries of the English language finally explained.
A salt in which the anion contains both iron (typically ferric iron) and oxygen.
- ‘He was at first disposed to regard the colour as being due to the production of a ferrate.’
- ‘The batch study showed that a ferrate dose of 15 mg/L gave effective removal of turbidity, COD, and coliform.’
Mid 19th century: from Latin ferrum ‘iron’ + -ate.
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