/ Dictionary / Index F ferrate: Meaning and Definition of Find definitions for: fer•rate Pronunciation: (fer'āt), [key] — n. Chem. a salt of the hypothetical ferric acid, HFeO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ferraro ferredoxin Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language