ˈfeˌrāt noun
( -s )
Etymology: International Scientific Vocabulary ferr- (from Latin ferrum iron) + -ate
: any of various classes of compounds containing iron and oxygen in the anion or regarded as so constituted: as
a. : a strongly oxidizing dark red salt analogous to the chromates and sulfates and formed in various ways (as by heating iron filings with a nitrate)
potassium ferrate K 2 FeO 4
— called also ferrate ( VI )
b. : ferrite