Definition of meridian

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Meridian (a.) A great circle of the sphere passing through the poles of the heavens and the zenith of a given place. It is crossed by the sun at midday.

Lern More About Meridian

Forenoon :: Forenoon (n.) The early part of the day, from morning to meridian, or noon..
Longitude :: Longitude (n.) The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris. The longitude of a place is expressed either in degrees or in time; as, that of New York is 74ยก or 4 h. 56 min. west of Greenwich..
Meridionality :: Meridionality (n.) The state of being in the meridian.
Metre :: Metre (n.) A measure of length, equal to 39.37 English inches, the standard of linear measure in the metric system of weights and measures. It was intended to be, and is very nearly, the ten millionth part of the distance from the equator to the north pole, as ascertained by actual measurement of an arc of a meridian. See Metric system, under Metric..
Drift :: Drift (n.) The angle which the line of a ship's motion makes with the meridian, in drifting..
Midheaven :: Midheaven (n.) The meridian, or middle line of the heavens; the point of the ecliptic on the meridian..
Meridian :: Meridian (a.) A great circle on the surface of the earth, passing through the poles and any given place; also, the half of such a circle included between the poles..
Magnetical :: Magnetical (a.) Of or pertaining to, or characterized by, the earth's magnetism; as, the magnetic north; the magnetic meridian..
Magnetic :: Magnetic (n.) Any metal, as iron, nickel, cobalt, etc., which may receive, by any means, the properties of the loadstone, and which then, when suspended, fixes itself in the direction of a magnetic meridian..
Westing :: Westing (n.) The distance, reckoned toward the west, between the two meridians passing through the extremities of a course, or portion of a ship's path; the departure of a course which lies to the west of north..
Meridional :: Meridional (a.) Of or pertaining to the meridian.
Analemma :: Analemma (n.) An orthographic projection of the sphere on the plane of the meridian, the eye being supposed at an infinite distance, and in the east or west point of the horizon..
Southing :: Southing (n.) The time at which the moon, or other heavenly body, passes the meridian of a place..
Declination :: Declination (n.) The arc of the horizon, contained between the vertical plane and the prime vertical circle, if reckoned from the east or west, or between the meridian and the plane, reckoned from the north or south..
South :: South (v. i.) To come to the meridian; to cross the north and south line; -- said chiefly of the moon; as, the moon souths at nine..
Meridionally :: Meridionally (adv.) In the direction of the meridian.
Dipleidoscope :: Dipleidoscope (n.) An instrument for determining the time of apparent noon. It consists of two mirrors and a plane glass disposed in the form of a prism, so that, by the reflections of the sun's rays from their surfaces, two images are presented to the eye, moving in opposite directions, and coinciding at the instant the sun's center is on the meridian..
Appulse :: Appulse (n.) The near approach of one heavenly body to another, or to the meridian; a coming into conjunction; as, the appulse of the moon to a star, or of a star to the meridian..
Transit :: Transit (n.) The passage of a heavenly body over the meridian of a place, or through the field of a telescope..
Easting :: Easting (n.) The distance measured toward the east between two meridians drawn through the extremities of a course; distance of departure eastward made by a vessel.
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