1. Plural of milligal; units of acceleration equal to one thousandth of a gal, used in measuring gravitational acceleration.
Usage: technical; physics; geology

Examples

• The gravimeter measured variations in gravitational acceleration of several milligals across the region.
• Geophysicists use milligals to detect subtle changes in Earth's gravitational field.
• The instrument's sensitivity was calibrated to detect differences as small as 0.1 milligals.
• Variations of 10 milligals can indicate subsurface density changes in geological surveys.