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glass wool

spun glass similar to wool, used for insulation, filters, etc.
Origin of glass wool
First recorded in 1875-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for glass wool
Historical Examples
  • Inside the inner skin there was a layer of glass wool for heat insulation.

    Space Platform Murray Leinster
  • glass wool serves to hold the calcium chloride and iodine in place.

    The Science of Fingerprints Federal Bureau of Investigation
  • A kind of glass wool is produced by drawing out to a capillary thread two glass rods of different degrees of hardness.


    William H. Dooley
  • The flask was then allowed to cool, the entering air being filtered through a plug of glass wool or asbestos.

  • Inside the glass wool was a layer of material serving exactly the function of the coating of a bulletproof gasoline tank.

    Space Platform Murray Leinster
British Dictionary definitions for glass wool

glass wool

fine spun glass massed into a wool-like bulk, used in insulation, filtering, etc
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
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