| 单词 | major circle |
| 释义 | > as lemmasmajor circle major circle n. †(a) = great circle n. at circle n. 2a (obsolete); (b) Geometry a circle that encloses an ellipse and has a diameter coincident with its major axis. ΚΠ 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 Vortex of any place, exactly dividing the East from the West. View more context for this quotation 1933 J. M. Child Elem. Coordinate Geom. xiii. 196 These two circles are of very great importance in the geometry of the ellipse; they are known as the major and minor auxiliary circles.] 1961 L. J. Adams & P. A. White Analytic Geom. & Calculus vii. 253 The circle of radius b is the minor auxiliary circle, and the circle of radius a is the major auxiliary circle. From O draw a line intersecting the minor circle at A and the major circle at B. 1989 Encycl. Brit. XIX. 943/2 A circle around the ellipse with O as its centre and a radius a is called the major circle or auxiliary circle. < as lemmas |
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