Definition of trackball in English:

trackball

Line breaks: track|ball
Pronunciation: /ˈtrakbɔːl
 
/
(also tracker ball)

noun

A small ball that is set in a holder and can be rotated by hand to move a cursor on a computer screen.
More example sentences
  • Other features tailored to the gaming community include the trackball interface, which not only supports trackballs and spinners, but also has three mouse buttons as well.
  • The scroll control comes from a ball built into the upper surface of the mouse - a kind of modern answer to the trackballs of old.
  • A trackball is stationary and the pointer can be moved using your thumb by rolling the ball which sits on the top.

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected