tromometer
noun
tro·mom·e·ter
trōˈmämətə(r)
: an instrument for measuring or detecting minute earth tremors
tromometric
adjective
¦tramə¦me‧trik
or tromometrical
-rə̇kəl
tromometry
noun
trōˈmämə‧trē
plural -es
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Merriam-Webster unabridged
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