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mineral wool

- 2 dictionary results

mineral wool

–noun
a woollike material for heat and sound insulation, made by blowing steam or air through molten slag or rock.
Also called rock wool.


Origin:
1880–85
mineral wool  
n.  An inorganic fibrous substance that is produced by steam blasting and cooling molten glass or a similar substance and is used as an insulator and a filtering material. Also called rock wool.
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