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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..

Circummeridian :: Circummeridian (a.) About, or near, the 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

Astrolabe :: Astrolabe (n.) A stereographic projection of the sphere on the plane of a great circle, as the equator, or a meridian; a planisphere..

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..

Northing :: Northing (n.) Distance northward from any point of departure or of reckoning, measured on a meridian; -- opposed to southing..

Meridional :: Meridional (a.) Of or pertaining to the meridian.

Pole :: Pole (n.) A point upon the surface of a sphere equally distant from every part of the circumference of a great circle; or the point in which a diameter of the sphere perpendicular to the plane of such circle meets the surface. Such a point is called the pole of that circle; as, the pole of the horizon; the pole of the ecliptic; the pole of a given meridian..

Meridian :: Meridian (a.) Being at, or pertaining to, midday; belonging to, or passing through, the highest point attained by the sun in his diurnal course..

Meridian :: Meridian (a.) Hence: The highest point, as of success, prosperity, or the like; culmination..

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

Transit :: Transit (n.) The passage of a heavenly body over the meridian of a place, or through the field of a telescope..

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

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..

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

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..

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..

Antoecians :: Antoecians (n. pl) Those who live under the same meridian, but on opposite parallels of latitude, north and south of the equator..

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

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