Mechanics and Astronomy. An oscillation of the axis of a rotating object; spec. the periodic variation of the inclination of the earth's axis…
单词 | θ1751 |
释义 | the world > the earth > geodetic references > [noun] > pole > axis > movement (4) nutation1703 Mechanics and Astronomy. An oscillation of the axis of a rotating object; spec. the periodic variation of the inclination of the earth's axis… pendulation1908 Physical Geography. A supposed oscillatory motion of the earth's poles across its surface. Now rare. polar wandering1909 the slow, erratic movement of the earth's poles relative to the continents which is thought to have occurred throughout geological time and is… polar wander1957 = polar wandering n. |
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