milligal
/ˈmɪlɪˌɡæl/
noun
- A unit of acceleration equal to one thousandth of a gal, used in geophysics to measure gravity.
- The difference in gravity between the two locations was only a few milligals.
- The gravimeter detected a change of 5 milligals at the survey site.
- Geologists use milligals to map underground rock formations.