nutation
词源链
- 英语English
nutation
词源说明
1610s, from Latin nūtātiō (“nodding”), from nūtō (“to nod”). Compare mutation.
释义
名词noun
- 1(physics) A bobbing motion that accompanies the precession of a spinning rigid body.
- 2A nodding motion (of the head etc.).
- 3(astronomy) Any of several irregularities in the precession of the equinoxes