pre.ces.sion

precession的音标和读音：
DJ音标发音： [pri:ˈseʃən]
KK音标发音： [priˈsɛʃən]

precession的词性：
n.（名词）

1. The act or state of preceding; precedence.
先行：向前运动的行为或状态；先行

2. Physics The motion of the axis of a spinning body, such as the wobble of a spinning top, when there is an external force acting on the axis.
【物理学】 进动：当受到外力作用时旋转体轴的运动，如旋转陀螺般的摇摆

3. Astronomy
【天文学】

4. Precession of the equinoxes.
分点岁差

5. A slow gyration of Earth's axis around the pole of the ecliptic, caused mainly by the gravitational pull of the sun, moon, and other planets on Earth's equatorial bulge.
岁差：地球中轴绕黄道极的缓慢旋转，主要由于太阳、月亮和其它星体对地球赤道降起带的重力作用而造成

precession的词源：

6. Late Latin praecessi? praecessi?n-
后期拉丁语 praecessi? praecessi?n-

7. from Latin praecessus [past participle of] praec?dere [to go before] * see precede
源自 拉丁语 praecessus [] praec?dere的过去分词 [回到从前] *参见 precede

precession的词性：
adj.（形容词）