Definition of rock wool in English English dictionary
Rock wool, also known as stone wool or mineral wool, means fibers made from synthetic or natural minerals or metal oxides. It is an inorganic substance used for insulation and filtering. A common mistake is to believe that fiberglass and ceramic fibers are NOT mineral wools, but they are by virtue of their consisting of minerals or metal oxides
Inorganic material made into matted fibre, used especially for insulation or soundproofing