gan·is·ter also gan·nis·ter (g n  -st r)n. 1. A fine-grained quartzite used to line refractory furnaces. 2. A mixture of fire clay and ground quartz, used to line metallurgical furnaces. [Origin unknown.] |
ganister, gannister [ˈgænɪstə]
n
1. (Earth Sciences / Geological Science) (Engineering / Metallurgy) a highly refractory siliceous sedimentary rock occurring beneath coal seams: used for lining furnaces
2. (Engineering / Metallurgy) a similar material synthesized from ground quartz and fireclay
[of unknown origin]
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