Definition of glass wool in English:

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glass wool

noun

[mass noun]
Glass in the form of fine fibres used for packing and insulation.
Example sentences
  • According to workers at the National Hospital, they became ill after contractors removed a layer of solar heat insulation made of glass wool from the factory roof on November 26.
  • Lay down glass wool insulation about 4 inches thick in your loft, lag the hot water tank, draught-proof windows and doors.
  • The ‘Santa House’, was, of course, covered with glass wool and not snow.
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