Note: in AM, use 'fiberglass'
1.
Fibreglass is plastic strengthened with short, thin threads of glass.
N-UNCOUNT
2.
Fibreglass is a material made from short, thin threads of glass which can be used to stop heat escaping.
N-UNCOUNT
Note: in AM, use 'fiberglass'
1.
Fibreglass is plastic strengthened with short, thin threads of glass.
N-UNCOUNT
2.
Fibreglass is a material made from short, thin threads of glass which can be used to stop heat escaping.
N-UNCOUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012