/ Dictionary / Index D dentalium: Meaning and Definition of Find definitions for: den•ta•li•um Pronunciation: (den-tā'lē-um), [key] — pl. -li•ums, -li•a. any tooth shell of the genus Dentalium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dental hygienist dentalize Related Content Daily Word Quiz: pauper Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language