evection
/ɪˈvɛkʃ(ə)n
/noun [mass noun] Astronomy
Regular variation in the eccentricity of the moon’s orbit around the earth, caused mainly by the sun’s attraction.
Origin
Mid 17th century (in the sense 'elevation, exaltation'): from Latin evectio(n-), from evehere 'carry out or up', from e- (variant of ex-) 'out' + vehere 'carry'.