/ Dictionary / Index A asphaltum: Meaning and Definition of Find definitions for: as•phal•tum Pronunciation: (as-fôl'tum or, esp. Brit., -fal'-), [key] — n. asphalt. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. asphalt rock aspherical Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language