/ Dictionary / Index C cystinuria: Meaning and Definition of Find definitions for: cys•ti•nu•ri•a Pronunciation: (sis"tu-noor'ē-u, -nyoor'-), [key] — n. Pathol. an inherited metabolic disorder that results in the excessive excretion of certain amino acids, esp. cystine, in the urine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cystine cystitis Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language