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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 74¡ or 4 h. 56 min. west of Greenwich..

North :: North (n.) That one of the four cardinal points of the compass, at any place, which lies in the direction of the true meridian, and to the left hand of a person facing the east; the direction opposite to the south..

Southing :: Southing (n.) Distance southward from any point departure or of reckoning, measured on a meridian; -- opposed to northing..

Forenoon :: Forenoon (n.) The early part of the day, from morning to meridian, or noon..

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..

Drift :: Drift (n.) The angle which the line of a ship's motion makes with the meridian, in drifting..

Meridionality :: Meridionality (n.) The state of being in 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..

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..

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..

Low :: Low (adv.) In a path near the equator, so that the declination is small, or near the horizon, so that the altitude is small; -- said of the heavenly bodies with reference to the diurnal revolution; as, the moon runs low, that is, is comparatively near the horizon when on or near the meridian..

Antemeridian :: Antemeridian (a.) Being before noon; in or pertaining to the forenoon. (Abbrev. a. m..

Postmeridian :: Postmeridian (a.) Fig., belonging to the after portion of life; late..

Rhumb :: Rhumb (n.) A line which crosses successive meridians at a constant angle; -- called also rhumb line, and loxodromic curve. See Loxodromic..

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.

Culmination :: Culmination (n.) The attainment of the highest point of altitude reached by a heavently body; passage across the meridian; transit.

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..

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..

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..

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