magnetograph

noun

mag·ne·to·graph mag-ˈnē-tō-ˌgraf

: an automatic instrument for recording measurements of a magnetic field (as of the earth or the sun)

Examples of magnetograph in a Sentence

Recent Examples on the Web To precisely study the sun's magnetic loops, researchers use a magnetograph, which measures the strength and direction of magnetic fields. —

Nathaniel Scharping, Discover Magazine, 1 Feb. 2016

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