index card
US /ˈɪn.deks ˌkɑːrd/
UK /ˈɪn.deks ˌkɑːrd/

1.
kartu indeks, kartu catatan
a small card used for writing notes, often for organizing information or for studying
:
•
She wrote her presentation notes on index cards.
Dia menulis catatan presentasinya di kartu indeks.
•
He used index cards to study for his history exam.
Dia menggunakan kartu indeks untuk belajar ujian sejarahnya.