• (n.) A white crystalline nitrogenous substance (C8H7NO) of the indol group, obtained by the reduction of dioxindol. It is a so-called lactam compound.
Ox·in'dol noun [ Ox ygen + indol .] (Chemistry) A white crystalline nitrogenous substance (C 8 H 7 NO) of the indol group, obtained by the reduction of dioxindol. It is a so-called lactam compound.