/ Dictionary / Index F ferrous: Meaning and Definition of Find definitions for: fer•rous Pronunciation: (fer'us), [key] — adj. Chem. of or containing iron, esp. in the bivalent state. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ferrous (Thesaurus) ferrotype ferrous oxide Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language