AMBULATOR
a person who walks or is given to walking, a walker; (also) a person who moves about from place to place, a traveller. now somewhat archaic.
a device for measuring distances, consisting of a wheel of known circumference which is attached to a handle and rolled along the ground by a person on foot.
a device for measuring distances, consisting of a wheel of known circumference which is attached to a handle and rolled along the ground by a person on foot.