The orbit of a satellite that is nearer the planet than it would be if it were in synchronous orbit

(astronomy) The surface (plane) that contains an orbit.

(anatomy) An eye socket.

(anatomy) An eye socket.

(chemistry) Either of a pair of orbitals, of two molecules or fragments, that overlap to form a bond; especially the HOMO and LUMO orbitals

A form of riveting involving a rotating peen tool mounted at an angle.

Orbital riveting.

In a retro-orbital direction.

(anatomy) Situated behind the orbit or the eye.

The orbit that an astronomical body such as a planet, asteroid, comet or satellite would follow if suddenly all perturbing forces other than the gravitational attraction of the Sun or (for a satellite) its planet were to disappear.