trackball - definition in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online (US)

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English definition of “trackball”

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trackball

noun [C] uk   us   /ˈtræk.bɔːl/
a ball on the keyboard of a laptop or other computer that you roll with your finger in order to move the cursor on the screen
(Definition of trackball from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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