( index cards)
An index card is a small card on which you can write information. Index cards are kept in a box, arranged in order.
N-COUNT
( index cards)
An index card is a small card on which you can write information. Index cards are kept in a box, arranged in order.
N-COUNT
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006