pointer

noun

1.
a mark to indicate a direction or relation
Derived from:
point
2.
an indicator as on a dial
Derived from:
point
3.
(computer science) indicator consisting of a movable spot of light (an icon) on a visual display; moving it allows the user to point to commands or screen positions
Derived from:
point
4.
a strong slender smooth-haired dog of Spanish origin having a white coat with brown or black patches; scents out and points to game