zanˈthīˌdrȯl, -rōl noun
Etymology: International Scientific Vocabulary xanth- + hydrol
: a crystalline secondary alcohol C 6 H 4 (CHOH)(O)C 6 H 4 that is obtained by reduction of xanthone and is readily oxidized back to it, that forms salts with strong acids and with sulfuric acid gives a yellow solution with green fluorescence, and that is used especially to characterize and determine urea by the formation of an insoluble product; xanthen-9-ol