a colorless, sweet-smelling oily liquid, CHOCHO, produced from corncobs, oat hulls, and other cereal wastes, used as a solvent and to make dyes, lacquers, synthetic resins, etc.
See furfural in American Heritage Dictionary 4
(fûrˈfə-rălˌ, -fyə-)
noun
A colorless, sweet-smelling, mobile liquid, C4H3OCHO, made from corncobs and used in the synthesis of furan, as a solvent for nitrocellulose, and as a fungicide and weed killer.