| 释义 |
prismatid, a. (n.) Cryst. rare.|ˈprɪzmətɪd|
[f. Gr. πρισµατ-, stem of πρίσµα prism + -id2.]
Applied to a crystalline form consisting of faces parallel to an axis and thus constituting the sides of a geometrical prism. b. n. A prismatid form.
1895Story-Maskelyne Crystallogr. vii. §302 The designations of..the horizontal prismatid forms as domes, the vertical one as a prism, have already been given in article 109. Ibid. §328 Among the varieties of prismatids, of which the poles always lie in a zone perpendicular to the zone-circle of symmetry, two are especially noticeable. |