The Collaborative International Dictionary
Oxindol
Oxindol \Ox*in"dol\, n. [Oxygen + indol.] (Chem.) A white crystalline nitrogenous substance ( C8H7NO) of the indol group, obtained by the reduction of dioxindol. It is a so-called lactam compound.
Wiktionary
oxindol
n. (archaic form of oxindole English)