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Noun: trackball  'trak`bol
  1. 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"

Derived forms: trackballs

Type of: electronic device

Encyclopedia: Trackball

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track
track and field
track down
track event
track meet
track record
track star
trackable
trackage
trackback
trackball
tracked
tracked vehicle
tracker
tracking
tracklayer
trackless
trackless trolley
tracksuit
track-to-track seek time
tract