A very pure, shiny black, brittle form of asphalt, used in making inks, paints, and varnishes.
More example sentences
- In the 1990s the state led the nation in beryllium and Gilsonite production.
- A general guideline is that 3% binder replacement with Gilsonite will double the viscosity of a binder.
late 19th century: named after Samuel H. Gilson, 19th-century American mineralogist, + -ite1.
Definition of Gilsonite in:
- The British & World English dictionary