| 单词 | semi diameter |
| 释义 | > as lemmassemi diameter semi-conjugate axis, semi diameter = conjugate semiaxis, semidiameter: see conjugate adj. 6a there, and quot. 1885 at semidiameter n. a. Also elliptical (as n.) for these. ΘΚΠ the world > relative properties > number > geometry > [adjective] > of geometrical relation reciprocal1570 regular1570 projectivea1652 semi-conjugate axis1743 homographic1859 symmetric1860 confocal1867 correlative1881 involutorial1885 conjugate1902 antisymmetrical1913 homoeomorphic1918 homotopic1918 isometric1952 1743 W. Emerson Doctr. Fluxions 187 Let AD be an Hyperbola, B the Center, BA = a, Semi-conjugate = b. 1791 Philos. Trans. 1790 (Royal Soc.) 80 536 CV and CW being a kind of semitransverse and semiconjugate axes to the elliptic track on the spherical surface. 1882 G. M. Minchin Uniplanar Kinematics 130 An ellipse referred to two semi-conjugate diameters, pa, pb, as axes. < as lemmas |
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