precession
/prɪˈseʃən/noun
mass noun
- Physics the slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis. It is seen in the circle slowly traced out by the pole of a spinning gyroscope.【物理】进动, 旋进。
派生词
precess
verbprecessional
adjective词源
late 16th cent. （as a term in astronomy， referring to the PRECESSION OF THE EQUINOXES）： from late Latin praecessio（n-）, from praecedere 'go before' （see PRECEDE）.