• synonyms


  1. a highly refractory, siliceous rock used to line furnaces.
  2. a synthetic product similar to this rock, made by mixing ground quartz with a bonding material.
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Origin of ganister

First recorded in 1805–15; origin uncertain
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ganister

Historical Examples

  • For furnace linings, the quartzite or ganister must be exceptionally pure.

    The Economic Aspect of Geology

    C. K. Leith

  • The principal uses of sandstone are for building stone, crushed stone, and ganister (for silica brick and furnace-linings).

  • These clays are highly silicious and in composition are intermediate between the Yorkshire fireclays and ganister.

  • After covering all the exposed steel surfaces with ganister, the plates are put in a gas furnace and heated to a welding heat.

  • Lower: Flaggy hard sandstones (ganister), shales and thin coal seams.

British Dictionary definitions for ganister



  1. a highly refractory siliceous sedimentary rock occurring beneath coal seams: used for lining furnaces
  2. a similar material synthesized from ground quartz and fireclay
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Word Origin

C19: of unknown origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012