(anatomy) A muscle of the face that encircles the orbit and passes through the eyelids, serving to close the eye.

(mathematics) Converted into an orbifold

plural of orbifolding

(mathematics) The generation of an orbifold

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.

(astrophysics) geostationary Earth orbit / (astrophysics) geostationary orbit (an orbit around any body)

(obsolete) bereaved; fatherless or childless

plural of orbicle

(obsolete) A small orb or sphere.

The state or quality of being orbiculate.