释义 |
hemiˈsymmetry Cryst. [hemi- b.] Same as hemihedrism. Hence hemisyˈmmetrical a., hemihedral.
1881Thudichum Ann. Chem. Med. II, Hemisymmetry in the Chemical Constitution of Gelatin. 1895Story-Maskelyne Crystallogr. §271 A few forms exhibit, in the defalcation of their alternate faces, the gyroidal hemi-symmetry, which, however, must be held really to dominate the structure of the entire crystal. Ibid. §280 Hemi-symmetrical crystals afford abundant examples of twin-structure. |