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MERIDIAN (from the Lat. meridianus, p...

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Originally appearing in Volume V18, Page 166 of the 1911 Encyclopedia Britannica.
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MERIDIAN (from the See also:Lat. meridianus, pertaining to the See also:south or See also:mid-See also:day) , in See also:general a direction toward the south or toward the position of the See also:sun at mid-day. The terrestrial meridian of a See also:place is the See also:great circle See also:drawn on the See also:earth's See also:surface from either See also:pole through the place. As determined astronomically the See also:celestial meridian is the great circle passing through the celestial pole and the See also:zenith. The terrestrial meridian as practically determined is the circle on the earth's surface in which the See also:plane of the celestial meridian cuts that surface. Owing to See also:local deviations of the plumb-See also:line the meridian thus determined does not strictly coincide with the terrestrial meridian as ordinarily defined, but the deviation, though perceptible in mountainous regions, is so See also:minute that it is generally ignored.

End of Article: MERIDIAN (from the Lat. meridianus, pertaining to the south or mid-day)

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