(~s)
A ~ is a block of clear glass or plastic which separates the light passing through it into different colours.
N-COUNT
(~s)
A ~ is a block of clear glass or plastic which separates the light passing through it into different colours.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012