trackball

[ trak-bawl ]
/ ˈtrækˌbɔl /

noun

a computer input device for controlling the pointer on a display screen by rotating a ball set inside a case.

Origin of trackball

First recorded in 1975–1980

British Dictionary definitions for trackball

trackball

trackerball (ˈtrækəˌbɔːl)

/ (ˈtrækˌbɔːl) /

noun

computing a device consisting of a small ball, mounted in a cup, which can be rotated to move the cursor around the screen