evection
/ɪˈvekʃən/noun
mass noun
- Astronomy regular variation in the eccentricity of the moon's orbit around the earth, caused mainly by the sun's attraction【天文】出差。
词源
mid 17th cent. (in the sense 'elevation, exaltation'): from Latin evectio(n-), from evehere 'carry out or up', from e- (variant of ex-) 'out'+vehere 'carry'.