(physics) An orbital formed by the combination of multiple atomic orbitals on the same atom

the bony ridge beneath the eyebrow; the browbone

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

plural of Hohmann orbit

plural of beta orbiter

plural of graveyard orbit

(space science) An orbit where spacecraft which have reached their end of life can be safely positioned to avoid colliding with other spacecraft or the Earth.

plural of orbital plane

plural of orbital motorway

(anatomy) In the skull, the ratio of the vertical height to the transverse width of the orbit, which is taken as the standard, equal to 100.