apsidal motion
noun Astronomy.
the rotation of the major axis of an eccentric orbit in the plane of the orbit.
Origin of apsidal motion
First recorded in 1955–60
Words nearby apsidal motion
après moi le déluge,
après-midi d'un faune, l',
après-ski,
apsaras,
apse,
apsidal motion,
apsidiole,
apsis,
apsu,
apsyrtus,
apt