read/write head

[ reed-rahyt ]
/ ˈridˈraɪt /

noun Computers.

an electromagnetic device, as in a disk or tape drive, that reads data from or writes data on a magnetic disk or tape.
Also called head.

British Dictionary definitions for read-write head

read-write head
/ (ˈriːdˈraɪt) /

noun

computing an electromagnet that can both read and write information on a magnetic medium such as magnetic tape or disk