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单词 right circle
释义

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right circle
right circle n. Obsolete a circle whose plane is perpendicular to a given plane; (Astronomy) a great circle of the celestial sphere whose plane is perpendicular to the right horizon.
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the world > the universe > celestial sphere > [noun] > right sphere
right circlec1400
right sphere1556
the world > relative properties > number > geometry > shape or figure > [noun] > two-dimensional > closed curve > circle > other
primitive circle1690
right circle1842
point-circle1865
in-circle1883
c1400 ( G. Chaucer Treat. Astrolabe (Brussels) (1940) ii. §26. f. 91 The spere solide..schewith openly the diuerse ascencions of signes..as wel in the riȝt [v.r. ryghtȝ] cercle as in the embelyf.
1679 J. Moxon Math. made Easie 18 Right Ascensions..always happen in a Right or Direct Sphere. But in an Oblique Sphere, only in the Right Circle or Meridian.
1725 W. Hawney Doctr. Plain & Spherical Geom. x. 169 The Pole of a right Circle is required.
1842 J. Gwilt Encycl. Archit. Gloss. 1026 Right Circle, a circle drawn at right angles with the plane of projection.
extracted from rightadj.int.
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更新时间:2024/12/24 3:26:50