| 单词 | latitude or meridian of vertex |
| 释义 | > as lemmaslatitude or meridian of vertex 2. The point in the heavens vertically overhead, or directly above a given place; the zenith. latitude or meridian of vertex (see quot. 1850). ΘΚΠ the world > the universe > celestial sphere > [noun] > zenith zenitha1387 vertical point1559 medium coeli1585 high noon1629 vertex1646 vertice1665 the world > the earth > geodetic references > [noun] > meridian > arc of latitude or meridian of vertex1850 the world > the earth > geodetic references > [noun] > latitude > equator > arc of latitude or meridian of vertex1850 1646 Sir T. Browne Pseudodoxia Epidemica ii. ii. 62 The true meridian is a major circle passing through the poles of the world, and the Zenith or Vertex of any place. View more context for this quotation 1665 T. Herbert Some Years Trav. (new ed.) 5 These sorts of people freeze within the polar circles,..the Pole being their vertex, and the Æquator..their direct Horizon. 1665 T. Herbert Some Years Trav. (new ed.) 39 The heat..when the Sun comes to the Vertex, is much more intense..than it is about the Polar Circles. 1715 tr. D. Gregory Elements Astron. I. ii. §56. 346 Since the Phænomenon..is in the common Azimuth XDZ..of the two Places on the Earth pitched upon for this purpose, whose Vertices are X and Z. 1748 B. Robins & R. Walter Voy. round World by Anson ii. v. 182 The sun was within about three degrees of the vertex. 1850 J. Greenwood Sailor's Sea-bk. 54 Either of these points is called the vertex of the great circle to which it belongs; the arc intercepted between the vertex and the equator is the latitude of vertex; the meridian that passes through the vertex is the meridian of vertex. 1867 W. H. Smyth & E. Belcher Sailor's Word-bk. Vertex, the zenith, the point overhead. < as lemmas |
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