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What (who) is trackball - definition
trackball
also track ball, tracker ball
(trackballs)
A trackball is a ball on some computers that you turn in order to move the cursor.
N-COUNT
trackball
(also tracker ball)
¦ noun a small ball set in a holder that can be rotated by hand to move a cursor on a computer screen.
Trackball
A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes—like an upside-down ball mouse with an exposed protruding ball. Users roll the ball to position the on-screen pointer, using their thumb, fingers, or the palm of the hand, while using the fingertips to press the buttons.
Wikipedia
Trackball
A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes—like an upside-down ball mouse with an exposed protruding ball. Users roll the ball to position the on-screen pointer, using their thumb, fingers, or the palm of the hand, while using the fingertips to press the buttons.
