\tɹˈakbɔːl], \tɹˈakbɔːl], \t_ɹ_ˈa_k_b_ɔː_l]\
Definitions of TRACKBALL
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an electronic device consisting of a rotatable ball in a housing; used to position the cursor and move images on a computer screen; "a trackball is essentially an upside-down mouse"
By Princeton University
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