/ Dictionary / Index P phthalic: Meaning and Definition of Find definitions for: phthal•ic Pronunciation: (thal'ik, fthal'-), [key] — adj. Chem. of or derived from phthalic acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phthalein phthalic acid 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