/ Dictionary / Index D dibutyl phthalate: Meaning and Definition of Find definitions for: dibu'tyl phthal'ate Pronunciation: (thal'āt, fthal'-), [key] — Chem. Chem. a colorless oily liquid, CHO, insoluble in water, used as a solvent, insect repellent, and plasticizer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dibucaine dicalcium silicate Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language