Definition of ganister in US English:



  • A close-grained, hard siliceous rock, or a similar synthetic product, used especially for lining furnaces.

    • ‘The other refractory plants had to have their ganister hauled in by rail.’
    • ‘The lip and rim of the ladles are also best lined with ganister.’
    • ‘Ganister is a rock that when ground and mixed with fire-clay has a very high tolerance to heat.’
    • ‘According to Pete Clarke, the tour will then explore the ganister loading siding between Three Springs and Saltillo and the path of the now-dismantled spur truck to the former North American Refractories Company quarry above Three Springs.’


Early 19th century: of unknown origin.