| 释义 |
gyroidal, a.|dʒaɪəˈrɔɪdəl|
[f. gyre or gyrus + -oid + -al1.]
1. Cryst. Having a spiral arrangement, as certain planes, etc. in some crystalline forms.
1864in Webster. 1895Story-Maskelyne Crystallogr. §177 The axes of symmetry..preserve the characteristics of the system, but in the absence of planes of symmetry they do so only by a gyroidal (or alternate) distribution of the poles. The edges consequently are gyroidally grouped in triads G round the trigonal axes o; and in tetrads V round the axes h. Ibid. §253 The gyroidal position of its faces in respect to the vertical axis.
2. Optics. Having the property of turning the plane of polarization to the right or left; rotatory in respect to polarized light.
1864in Webster.
Hence gyˈroidally adv.
1895[see sense 1 above]. |