/ Dictionary / Index A amantadine: Meaning and Definition of Find definitions for: a•man•ta•dine Pronunciation: (u-man'tu-dēn"), [key] — n. Pharm. a water-soluble crystalline substance, CHNHCl, used as an antiviral and antiparkinsonian drug. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Amanite amanuensis Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language