adapter
n. countablen. a small tool that lets you connect two pieces of equipment that were not made to fit together. You often use one when you travel to a country with different electrical plugs.
n. a device for connecting pieces of equipment that cannot be joined directly. Often refers to a hardware component that converts one voltage or physical interface to another.
I need a travel adapter for my laptop charger.
Since the old monitor only has a VGA port, you will need a digital adapter to connect it to your new computer.
The technician recommended a universal adapter to ensure compatibility between the legacy audio equipment and the modern digital recording interface.
From adapt + -er.
Commonly followed by 'for' to indicate the intended device or 'to' for the target connection.