dimetric, a. Cryst.
(daɪˈmɛtrɪk)
[f. Gr. δι-, δίς twice + µέτρον measure + -ic: cf. metric.]
Applied to a system of crystals having three axes at right angles, the two lateral axes being equal to each other but unequal to the vertical axis; = tetragonal.
| 1868 Dana Min. Introd. 21 The names Monometric, Dimetric, and Trimetric, used in former editions of this work, have been set aside..The names want precision, the hexagonal system being as much dimetric as the tetragonal. Ibid. 24 Tetragonal System (also called Quadratic, Pyramidal, Monodimetric, Dimetric). 1873 Fownes' Chem. (ed. 11) 279 The dimetric are also very symmetrical, about three axes at right angles to each other. |