orbital cavity n.
The bony cavity containing the eyeball and its associated muscles, vessels, and nerves. Also called eye socket, orbit.
When complete the orbital cavity has the form of a regular hollow cone, open at its base and closed at the apex.
The inferior margin of this process forms a part of the boundary of the anterior opening of the orbital cavity.
In the skull the orbital cavity is nearly or quite surrounded by bone, and the tympanic bulla is large and inflated.