/ Dictionary / Index R resorcinolphthalein: Meaning and Definition of Find definitions for: res•or•cin•ol•phthal•e•in Pronunciation: (ri-zôr'su-nôl-thal'ēn, -ē-in, -fthal'-, -nol-, rez-ôr'-), [key] — n. Chem. fluorescein. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: resorcinolphthalein (Thesaurus) resorcinol resorption Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language