(~s)
A ~ is a chemical compound with large molecules made of many smaller molecules of the same kind. Some ~s exist naturally and others are produced in laboratories and factories.
N-COUNT
(~s)
A ~ is a chemical compound with large molecules made of many smaller molecules of the same kind. Some ~s exist naturally and others are produced in laboratories and factories.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012