metrograph

Noun

 * 1) An instrument attached to a locomotive for recording its speed and the number and duration of its stops.
 * 2) A device used to measure the flow and velocity of liquids.
 * 3) Any of various devices that continuously record several meteorological phenomena; a radiosonde or one of its precursors.
 * 4) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.
 * 1) Any of various devices that continuously record several meteorological phenomena; a radiosonde or one of its precursors.
 * 2) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.
 * 1) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.
 * 1) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.
 * 1) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.
 * 1) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.
 * 1) A device that uses reflection holograms to accurately measure three-dimensional objects, used primarily in orthodontics.