MERIDIAN
Dictionary of Science, Literature and Art · 1854 · p. 20
(Lat. tneridies, mid-day.) In Astronomy, a great circle of the sphere pa ing through the earth's axis and the zenith of the spectator. It is the circle on which the latitudes of places are reckoned, commencing from the equator, which it intersects at right angles. The terrestrial meridian is the great circle (or rather ellipse) formed by the intersection of the surface of the earth with the plane pa ing through the poles and the place of the spectator. See Degree. [s. 752]
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