/ Dictionary / Index D d.t.d.: Meaning and Definition of Find definitions for: d.t.d. Pronunciation: [key] (in prescriptions) give such doses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. DT D.Th. Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language