urerythrineChem.|jʊərəˈrɪθraɪn| [f. ur-ine + erythrin.] (See quots.) 1858Thudichum Urine 321 Ureythrine occurs in fresh urine generally in a dissolved state.1878Kingzett Animal Chem. 238 Urerythrine is a substance first described by Proust under the name of rosacic acid.