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ganister definition

gan·is·ter (gan′is tər)

noun

a hard, siliceous sedimentary rock sometimes found underlying coal beds, used in making brick for refractory linings of metallurgical furnaces

Etymology: Ger dial. ganster < MHG, a spark, akin to OE gnast, spark: see gneiss

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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