trackball

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Related to trackballs: computer output microfilm

trackball

a type of computer peripheral that is larger than a typical mouse having one large ball to use to move the cursor and two large buttons for click commands.
References in periodicals archive ?
The three trackballs in the middle of the panel are well crafted and have a good weight to them; the movements are fluid and quite sensitive, giving users the power to finely adjust their colour wheels and primary parameters.
A trackball is a standard computer device that replaces the conventional mouse.
Also keep in mind that all the Windows customization options mentioned here are equally appropriate for trackball users.
Even if you have good hand function, the trackball can improve your speed and rhythm if you sit in a wheelchair while you are using the computer.