Trackball (noun)

A pointing device that is used to move a cursor on a computer screen, consisting of a ball that is held in place by a socket and can be rotated with the fingers to move the cursor.

Origin:

From the combination of the words "track" and "ball".

Examples:

1. He preferred using a trackball over a mouse for controlling the cursor on his computer.
2. The trackball on her laptop was worn out so she had to replace it.
3. The trackball allowed for more precise cursor movement.
4. The designer used a trackball to navigate and zoom in and out on the digital drawing.
5. The trackball was a popular input device in the early days of the personal computers.