spun glass similar to wool, used for insulation, filters, etc.
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How to use glass wool in a sentence
The dark mass was extracted with hot concentrated HCl, the acid extracts filtered through glass wool using a hot water funnel.
A kind of glass wool is produced by drawing out to a capillary thread two glass rods of different degrees of hardness.Textiles | William H. Dooley
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
The flask was then allowed to cool, the entering air being filtered through a plug of glass wool or asbestos.Scientific American Supplement, No. 288 | Various
glass wool serves to hold the calcium chloride and iodine in place.The Science of Fingerprints | Federal Bureau of Investigation
British Dictionary definitions for 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