glass wool

/ˌglæs ˈwʊl/
IPA guide

Definitions of glass wool
  1. noun
    glass fibers spun and massed into bundles resembling wool
    see moresee less
    type of:
    filter
    device that removes something from whatever passes through it
    dielectric, insulator, nonconductor
    a material such as glass or porcelain with negligible electrical or thermal conductivity
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