(~s)
A ~ is a glass lens which people wore in former times in front of one of their eyes to improve their ability to see with that eye.
N-COUNT
(~s)
A ~ is a glass lens which people wore in former times in front of one of their eyes to improve their ability to see with that eye.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012