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

Day :: Day (n.) The period of the earth's revolution on its axis. -- ordinarily divided into twenty-four hours. It is measured by the interval between two successive transits of a celestial body over the same meridian, and takes a specific name from that of the body. Thus, if this is the sun, the day (the interval between two successive transits of the sun's center over the same meridian) is called a solar day; if it is a star, a sidereal day; if it is the moon, a lunar day. See Civil day, Sidereal day
Meridian :: Meridian (a.) Hence: The highest point, as of success, prosperity, or the like; culmination..
Forenoon :: Forenoon (n.) The early part of the day, from morning to meridian, or noon..
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..
Perioecians :: Perioecians (n. pl.) Those who live on the same parallel of latitude but on opposite meridians, so that it is noon in one place when it is midnight in the other. Compare Antoeci..
Inferior :: Inferior (a.) Below the horizon; as, the inferior part of a meridian..
Circummeridian :: Circummeridian (a.) About, or near, 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..
Postmeridian :: Postmeridian (a.) Coming after the sun has passed the meridian; being in, or belonging to, the afternoon. (Abbrev. P. M.).
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..
Antoecians :: Antoecians (n. pl) Those who live under the same meridian, but on opposite parallels of latitude, north and south of the equator..
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..
Northing :: Northing (n.) Distance northward from any point of departure or of reckoning, measured on a meridian; -- opposed to southing..
Latitude :: Latitude (n.) Distance north or south of the equator, measured on a meridian..
Transit :: Transit (n.) The passage of a heavenly body over the meridian of a place, or through the field of a telescope..
Meridional :: Meridional (a.) Of or pertaining to the meridian.
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..
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.
Southing :: Southing (n.) Distance southward from any point departure or of reckoning, measured on a meridian; -- opposed to northing..
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