1. oscillates or moves back and forth in a regular pattern, especially with a slight trembling motion
Usage: technical; astronomy

Examples

• The moon librates slightly as it orbits Earth.
• The pendulum librates with perfect regularity.
• Due to gravitational forces, the satellite librates around its axis.
• The compass needle librates before settling on magnetic north.
• Scientists observed how the celestial body librates in its orbit.
• The balance wheel librates back and forth in the watch mechanism.