| Answer | Crossword Clue |
|---|---|
| trackball | a spherical ball mounted in a box structure that can be used to control a computer cursor |
| trackballs | TRACKBALL, a spherical ball mounted in a box structure that can be used to control a computer cursor |
| trackball | A small ball set in a holder that can be rotated by hand to move a cursor on a computer screen |
| trackballs | A small ball set in a holder that can be rotated by hand to move a cursor on a computer screen |
