| 单词 | metastrophe |
| 释义 | metastrophe|mɛˈtæstrəfiː|
[a. Gr. µεταστροϕή change from one thing to another; related to µεταστρέϕειν to turn round, f. µετα-, meta- + στρέϕειν to turn.]
†1. ? nonce-use. (See quot.)
1654H. L'Estrange Chas. I (1655) 93 The Town suffering a metastrophe, change of name as well as nature, was ordered to be called..Borgo Maria.
2. Cryst. (See quot.) Hence metaˈstrophic a.
1895Story-Maskelyne Crystallogr. 99 A solid figure is symmetrical to an axis when every radius vector moving in a plane perpendicular to the axis and meeting a point of the figure would also meet corresponding points at the same distances from the axis at each revolution through an arc-angle of 2 π/n. The aspect of such a solid figure will not therefore be changed by a revolution of the solid round this axis through the angle 2 π/n, and any portion of its surface so revolving will move into a position in which it will be congruent with another portion of the surface entirely corresponding to it. Def.—Congruence of this kind will be termed metastrophe, and such corresponding parts will be said to be metastrophic to each other. 1899W. J. Lewis Crystallogr. 18 We shall generally express the relation by saying that the like faces, edges and coigns disposed about an axis of symmetry are interchangeable or metastrophic. |
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