Nutation

noun

Definitions

Noun
  1. 1
    A bobbing motion that accompanies the precession of a spinning rigid body. countable, uncountable
  2. 2
    uncontrolled nodding wordnet
  3. 3
    A nodding motion (of the head etc.). countable, uncountable
  4. 4
    Any of several irregularities in the precession of the equinoxes caused by varying torque applied to the Earth by the Sun and the Moon. countable, uncountable
  5. 5
    The circular motion of the tip of a growing shoot. countable, uncountable

Etymology

1610s, from Latin nūtātiō (“nodding”), from nūtō (“I nod”). Compare mutation.

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