365bet中国官方网站

  • word of the day

    trackball

    trackball - 365bet中国官方网站 definition and meaning for word trackball

    Definition
    (noun) an electronic device consisting of a rotatable ball in a housing; used to position the cursor and move images on a computer screen
    Example Sentence
    • a trackball is essentially an upside-down mouse
  • Download our Mobile App Today