The Collaborative International Dictionary
Magnetograph
Magnetograph \Mag*net"o*graph\, n. [Magneto- + -graph.] (Physics) An automatic instrument for registering, by photography or otherwise, the states and variations of any of the terrestrial magnetic elements.
Wiktionary
magnetograph
n. A instrument for measuring changes in the direction and intensity of magnetic fields
Wikipedia
Magnetograph
A magnetograph is one of two types of scientific instrument:
- A special type of magnetometer that records a time plot of the local magnetic field near the instrument; or
- A telescope capable of producing magnetograms: maps of the magnetic field strength and/or direction on a distant object such as the Sun, using the Zeeman splitting or other spectral signatures of magnetization. (see vector magnetograph)
Usage examples of "magnetograph".
Humming Scottish tunes, he spent hours by the preventers under the floor of the derrick, busying himself with a magnetograph and making notes.
Will removed the tape from the magnetograph and, whistling to himself, examined the recording.