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'.