a walking robot

A hexapod robot is a mechanical vehicle whose locomotion is based on three pair of legs. The term commonly refers to robots biologically inspired by Hexapoda locomotion. Hexapod robots are considered to be more stable than bipedal robots because in most cases hexapods are statically stable.

Having six feet.

(noun or adjective) A creature with six limbs, most commonly six legs.

a parallel mechanism that gives you movement in six axes to control -- X, Y, Z, roll, pitch, and yaw