variometer
va·rio·me·ter
noun
1.
a measuring instrument for measuring variations in a magnetic field
Origin
Borrowed from Latin varius (“various”) + -meter.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.