°Any of several fibrous mineral forms of magnesium silicate, used for fireproofing, electrical insulation, building materials, brake linings, and chemical filters; The small fibres can cause cancer when lodged in the lungs.
°Any of several fibrous mineral forms of magnesium silicate, used for fireproofing, electrical insulation, building materials, brake linings, and chemical filters; The small fibres can cause cancer when lodged in the lungs.