/ Dictionary / Index A arfvedsonite: Meaning and Definition of Find definitions for: arf•ved•son•ite Pronunciation: (är'vid-su-nīt"), [key] — n. Mineral. a sodium-rich amphibole, occurring in green to black crystals in alkalic rocks. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arf Arg Related Content Daily Word Quiz: denizen Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language