NUTATION
- a nodding (the action of a nod) [n -S]
- act or instance of nodding one's head, esp. involuntarily or spasmodically
- spontaneous movements of plant parts during growth
- the periodic oscillation observed in the precession of the earth's axis and the precession of the equinoxes
- an oscillatory movement of the axis of a rotating body [n NUTATIONS]
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