/ Dictionary / Index F ferro-: Meaning and Definition of Find definitions for: ferro- Pronunciation: [key] var. offerroconcrete. In chemical terminology, the meanings ofandare specialized to correspond to ferric and ferrous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ferritin ferroalloy 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