| Rating | Solver | Clue |
|---|---|---|
| ODOMETER | Instrument measuring distance travelled | |
| PEDOMETER | Instrument for measuring distance | |
| OPTOMETER | An instrument for measuring the distance of distinct vision, mainly for the selection of eveglasses. | |
| WAYWISER | An instrument for measuring the distance which one has traveled on the road; an odometer, pedometer, or perambulator. | |
| TELEMETER | An instrument used for measuring the distance of an object from an observer; as, a telescope with a micrometer for measuring the apparent diame... | |
| PERAMBULATOR | A surveyor's instrument for measuring distances. It consists of a wheel arranged to roll along over the ground, with an apparatus of clockwork,... | |
| HELIOMETER | An instrument devised originally for measuring the diameter of the sun; now employed for delicate measurements of the distance and relative dir... | |
| OBSERVATION | Specifically, the act of measuring, with suitable instruments, some magnitude, as the time of an occultation, with a clock; the right ascension... | |
| STADIUM | ... distance of the place where it stands from an instrument having a telescope, by observing the number of the graduations of the rod that are see... | |