/ Dictionary / Index F ferriferous: Meaning and Definition of Find definitions for: fer•rif•er•ous Pronunciation: (fu-rif'ur-us), [key] — adj. producing or yielding iron: ferriferous rock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ferricyanide ferrihemoglobin 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