/ Dictionary / Index F ferrosilicon: Meaning and Definition of Find definitions for: fer•ro•sil•i•con Pronunciation: (fer"ō-sil'i-kun, -kon"), [key] — n. a ferroalloy containing up to 95 percent silicon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ferronickel ferrotitanium Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language