Definition of Gilsonite in English:


Line breaks: Gil¦son|ite
Pronunciation: /ˈɡɪlsənʌɪt


[mass noun] trademark
A very pure, shiny, brittle black 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.

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Pronunciation: ˈrɛtrə(ʊ)flɛks
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