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Infraorbital :: Infraorbital (a.) Below the orbit; as, the infraorbital foramen; the infraorbital nerve..

Perihelium :: Perihelium (n.) That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to aphelion.

Sphere :: Sphere (n.) An orbit, as of a star; a socket..

Dear :: Dear (superl.) Marked by scarcity or dearth, and exorbitance of price; as, a dear year..

Orbituary :: Orbituary (a.) Orbital.

Comet :: Comet (n.) A member of the solar system which usually moves in an elongated orbit, approaching very near to the sun in its perihelion, and receding to a very great distance from it at its aphelion. A comet commonly consists of three parts: the nucleus, the envelope, or coma, and the tail; but one or more of these parts is frequently wanting. See Illustration in Appendix..

Orbitosphenoid :: Orbitosphenoid (n.) The orbitosphenoid bone, which is situated in the orbit on either side of the presphenoid. It generally forms a part of the sphenoid in the adult..

Aberration :: Aberration (n.) A small periodical change of position in the stars and other heavenly bodies, due to the combined effect of the motion of light and the motion of the observer; called annual aberration, when the observer's motion is that of the earth in its orbit, and daily or diurnal aberration, when of the earth on its axis; amounting when greatest, in the former case, to 20.4'', and in the latter, to 0.3''. Planetary aberration is that due to the motion of light and the motion of the planet re

Velocity :: Velocity (n.) Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light..

Exorbitancy :: Exorbitancy (n.) A going out of or beyond the usual or due limit; hence, enormity; extravagance; gross deviation from rule, right, or propriety; as, the exorbitances of the tongue or of deportment; exorbitance of demands..

Eccentricity :: Eccentricity (n.) The ratio of the distance of the center of the orbit of a heavenly body from the center of the body round which it revolves to the semi-transverse axis of the orbit.

Mesoseme :: Mesoseme (a.) Having a medium orbital index; having orbits neither broad nor narrow; between megaseme and microseme.

Orbity :: Orbity (n.) Orbation.

Aphelion :: Aphelion (n.) That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion..

Orbit :: Orbit (n.) The skin which surrounds the eye of a bird.

Ophthalmic :: Ophthalmic (a.) Of, pertaining to, or in the region of, the eye; ocular; as the ophthalmic, or orbitonasal, nerve, a division of the trigeminal, which gives branches to the lachrymal gland, eyelids, nose, and forehead..

Brontotherium :: Brontotherium (n.) A genus of large extinct mammals from the miocene strata of western North America. They were allied to the rhinoceros, but the skull bears a pair of powerful horn cores in front of the orbits, and the fore feet were four-toed. See Illustration in Appendix..

Orbitonasal :: Orbitonasal (a.) Of or pertaining to the orbit and the nose; as, the orbitonasal, or ophthalmic, nerve..

Orrery :: Orrery (n.) An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system..

Orbitolites :: Orbitolites (n.) A genus of living Foraminifera, forming broad, thin, circular disks, containing numerous small chambers..

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