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orbit
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- Orbit - n. - The path described by a heavenly body in its periodical revolution around another body; as, the orbit of Jupiter, of the earth, of the moon.
- Orbit - n. - An orb or ball.
- Orbit - n. - The cavity or socket of the skull in which the eye and its appendages are situated.
- Orbit - n. - The skin which surrounds the eye of a bird.
- Orbital - a. - Of or pertaining to an orbit.
- Orbitar - a. - Orbital.
- Orbitary - a. - Situated around the orbit; as, the orbitary feathers of a bird.
- Orbitelae - n. pl. - A division of spiders, including those that make geometrical webs, as the garden spider, or Epeira.
- Orbitolites - n. - A genus of living Foraminifera, forming broad, thin, circular disks, containing numerous small chambers.
- Orbitonasal - a. - Of or pertaining to the orbit and the nose; as, the orbitonasal, or ophthalmic, nerve.
- Orbitosphenoid - a. - Of or pertaining to the sphenoid bone and the orbit, or to the orbitosphenoid bone.
- 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.
- Orbitosphenoidal - a. - Of or pertaining to the orbitosphenoid bone; orbitosphenoid.
- Orbituary - a. - Orbital.
- Orbitude - n. - Alt. of Orbity
- Orbity - n. - Orbation.
- Orbitonasal - a. - Of or pertaining to the orbit and the nose; as, the orbitonasal, or ophthalmic, nerve.
- Perihelium - n. - That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to aphelion.
- Apastron - n. - That point in the orbit of a double star where the smaller star is farthest from its primary.
- Apogee - n. - That point in the orbit of the moon which is at the greatest distance from the earth.
- Eyecup - n. - A small oval porcelain or glass cup, having a rim curved to fit the orbit of the eye. it is used in the application of liquid remedies to eyes; -- called also eyeglass.
- Harderian - a. - A term applied to a lachrymal gland on the inner side of the orbit of many animals which have a third eyelid, or nictitating membrane. See Nictitating membrane, under Nictitate.
- Supraorbitar - a. - Situated above the orbit of the eye.
- Venus - n. - One of the planets, the second in order from the sun, its orbit lying between that of Mercury and that of the Earth, at a mean distance from the sun of about 67,000,000 miles. Its diameter is 7,700 miles, and its sidereal period 224.7 days. As the morning star, it was called by the ancients Lucifer; as the evening star, Hesperus.
- Node - n. - One of the two points where the orbit of a planet, or comet, intersects the ecliptic, or the orbit of a satellite intersects the plane of the orbit of its primary.
- Cycle - n. - An imaginary circle or orbit in the heavens; one of the celestial spheres.
- 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.
- Evection - - An inequality of the moon's motion is its orbit to the attraction of the sun, by which the equation of the center is diminished at the syzygies, and increased at the quadratures by about 1¡ 20'.
- Ellipse - n. - The elliptical orbit of a planet.
- 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.
- Anomaly - n. - The angular distance of a planet from its perihelion, as seen from the sun. This is the true anomaly. The eccentric anomaly is a corresponding angle at the center of the elliptic orbit of the planet. The mean anomaly is what the anomaly would be if the planet's angular motion were uniform.
- Orbit - n. - The path described by a heavenly body in its periodical revolution around another body; as, the orbit of Jupiter, of the earth, of the moon.
- Periastron - n. - That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.
- Eccentric - n. - In the Ptolemaic system, the supposed circular orbit of a planet about the earth, but with the earth not in its center.
- Perigeum - n. - That point in the orbit of the moon which is nearest to the earth; -- opposed to apogee. It is sometimes, but rarely, used of the nearest points of other orbits, as of a comet, a planet, etc. Called also epigee, epigeum.
- Radius vector - n. - An ideal straight line joining the center of an attracting body with that of a body describing an orbit around it, as a line joining the sun and a planet or comet, or a planet and its satellite.
- 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.
- Exorbitant - a. - Departing from an orbit or usual track; hence, deviating from the usual or due course; going beyond the appointed rules or established limits of right or propriety; excessive; extravagant; enormous; inordinate; as, exorbitant appetites and passions; exorbitant charges, demands, or claims.
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