English

Definition of trackball noun from the Oxford Advanced Learner's Dictionary

 

trackball

 noun
noun
BrE BrE//ˈtrækbɔːl//
 
; NAmE NAmE//ˈtrækbɔːl//
 
(also tracker ball, rollerball) (computing)
 
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a device containing a ball that is used instead of a mouse to move the cursor around the screen
See the Oxford Advanced American Dictionary entry: trackball