| 单词 | precession of the equinoxes |
| 释义 | precession of the equinoxes [prē`sesh·ǝn ǝv thǝ `ē·kwǝ´näk·sǝz] ASTRONOMY A slow conical motion of the earth's axis about the vertical to the plane of the ecliptic, having a period of 26,000 years, caused by the attractive force of the sun, moon, and other planets on the equatorial protuberance of the earth; it results in a gradual westward motion of the equinoxes. |
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