gradiometer
noun/ˌɡreɪdiˈɒmɪtə(r)/
/ˌɡreɪdiˈɑːmɪtər/
- (specialist) an instrument for measuring the angle of a slope
- (physics) an instrument for measuring the changes in an energy field
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gradiometer
Definition of gradiometer noun from the Oxford Advanced Learner's Dictionary