Definition of orbitals:
(adj) :
Of or relating to, or forming an orbit (such as the orbit of a moon, planet, or spacecraft).
(n) :
(physics) A specification of the energy and probability density of one or more electrons at any point in an atom or molecule, representable as a wave function.
(adj) :
(anatomy) Of or relating to the eye socket (eyehole).
(adj) :
(chiefly UK) (of roads, railways) Passing around the outside of an urban area.
(n) :
Ellipsis of orbital sander. [A hand-held sander that vibrates in small circles, or orbits.]
(n) :
(chiefly UK) Ellipsis of orbital motorway. [Synonym of ring road.]