xanthone
nounDihydroxybenzophenone anhydrid; a colorless compound, , prepared by the oxidation of methylenedipheny-lene oxid. It crystallizes in long needles, melts at 173β174Β° C., boils at 349β350Β° C., is volatile with steam, and is the parent substance of a considerable number of natural coloring matters.
nounAn