spun glass similar to wool, used for insulation, filters, etc.
George GlassRead more in this article about some frequently asked questions and fun facts related to our definitions.
Origin of glass wool
First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for glass wool
The gas loses its conductivity when filtered through a plug of glass-wool, or when it is made to bubble through water.
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