| 释义 |
orthosymmetric, a.|ˌɔːθəʊsɪˈmɛtrɪk|
[f. ortho- + symmetric.]
1. Math. orthosymmetric determinant: a symmetric determinant in which all the constituents in the secondary diagonal, and likewise all those in each of the oblique rows parallel to it, are equal.
Example of an orthosymmetric determinant:
{vb}a b c{vb}
{vb}b c d{vb}
{vb}c d e {vb}
2. Cryst. Symmetric about two, or three, axes at right angles to each other; spec. = orthorhombic.
1895Story-Maskelyne Crystallogr. §421 The Ortho⁓symmetric or Ortho-rhombic system represents the most general case of a crystallographic plane-system referred to rectangular axes; [that] in which the parameters are all different, and the three axes are axes of orthosymmetry.
So orthosyˈmmetrical a. = prec. 2; orthosyˈmmetrically adv.; orthoˈsymmetry.
1880Story-Maskelyne in Nature XXI. 204/1 Not being a crystal of any of the orthosymmetrical systems. 1895― Crystallogr. §79 A rhomb is orthosymmetrical to its diagonals, as a rectangle is to diameters parallel to its sides. Ibid., A face of a crystal or any other plane surface or figure..symmetrical to two lines perpendicular to each other..will be said to be orthosymmetrically divided by these lines. 1878Gurney Crystallogr. 37 Orthogonal symmetry or orthosymmetry. |