Bankbook (noun)

1. A record book kept by a bank containing records of deposits, withdrawals and interest earned on an account.
2. A physical book provided by a bank for the account holder to record their transactions. It may also act as a passbook.

Origin:

From bank + book, from the phrase "bank book" which means a book kept by a bank containing records of deposits and withdrawals.

Examples:

1. He checked his bankbook to see how much money he had in his account.
2. She deposited money into her bankbook account.
3. He used his bankbook to withdraw money from the bank.
4. The bankbook was a way for the customer to keep track of their savings account.
5. She used her bankbook to deposit her paycheck.