glass wool

1. 1.

   glass fibers spun and massed into bundles resembling wool

   Broaderinsulatorfilter

Questions about glass wool

What does glass wool mean?

glass wool means "glass fibers spun and massed into bundles resembling wool".

Is glass wool a common word?

glass wool is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.