orb-, orbito-
(Latin: rut or track made in the ground by a wheel; circle, ring, round surface, disk)
Also used in its extended anatomical sense as, "the portion of the skull immediately surrounding the eye".
anteorbital, antorbital
1. Situated in front of the eye.
2. Pertaining to, or situated in, the region in front of the orbit.
deorbit
1. To depart deliberately from orbit, usually to enter a descent phase.
2. To cause to deliberately depart from orbit.
In physics, an orbit is the path that an object makes around another object while under the influence of a source of force; such as, gravity.
infraorbital
Below the orbit; such as, the infraorbital foramen (small opening, perforation, or orifice; a fenestra (small opening); the infraorbital nerve.
interorbital
1. Situated or extending between the orbits of the eyes.
2. Between the orbits; such as, the interorbital septum (a dividing wall or partition, a general term for such a structure).
orb
A spherical body; especially, the eyeball.
A sphincter is a circular muscle constricting an orifice. In normal tonic condition, it closes the orifice; that is, the muscle must relax to allow the orifice to open.
orbicular, orbicularis
Circular; spherical.
orbiculate
1. A solid the vertical section of which is oval, and the horizontal section circular.
2. Orbicular; rounded.
orbiculated
Made, or being, in the form of an orb; having a circular, or nearly circular, or a spheroidal, outline.
orbiculus (s), orbiculi (pl)
1. Muscle surrounding an orifice; a sphincter muscle.
2. A small, disk-shaped structure.
orbit
1. The path of a celestial body or an artificial satellite as it revolves around another body; one complete revolution of such a body.
2. The curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.
3. The path of a body in a field of force surrounding another body; for example, the movement of an atomic electron in relation to a nucleus.
4. A range of activity, experience, or knowledge; a range of control or influence.
5. The usual course of one's life or range of one's activities.
6. The sphere of power or influence, as of a nation or person: a small nation in the Russian orbit.
7. In physics, the path traced by an electron revolving around the nucleus of an atom.
8. An orb or sphere.
9. In zoology, the part surrounding the eye of a bird or insect.
10. Either of two bony cavities in the skull containing an eye and its external structures; an eye socket.
The bony pyramid-shaped cavity of the skull that contains and protects the eyeball. It is pierced posteriorily by the optic foramen (which transmits the optic nerve and ophthalmic artery), the superior and inferior orbital fissures, and several foramina. It is also formed by the frontal, malar, ethmoid, maxillary, lacrimal, sphenoid, and palatine bones.
orbita (s), orbitae (pl)
The pyramidal bony cavity in the skull that contains the eyeball and its accessory organs and comprises a roof, a floor, medial and lateral walls, and the orbital opening which forms the base anteriorly. Also called: orbit, orbital cavity, eye socket, concha of eye (outmoded), arcula (outmoded).
orbital
1. A reference to the orbit or its contents.
2. Denoting an electron confined to its orbit in an atom, as distinguished from a free electron.
orbitale
In cephalometrics, the lowermost craniometric point in the lower margin of the bony orbit (orbital margin) that may be felt under the skin.
orbitalis
Referring to one or both orbits.
orbiter
1. In aerospace, something that orbits, especially a spacecraft that orbits a planet or moon without landing on it.
2. A spacecraft or satellite designed to orbit an astronomical object but not to land on it.
Also called "space-shuttle orbiter": the crew-carrying and the payload-carrying component of the space shuttle.
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