单词 | hetero-axial |
释义 | > as lemmasˌhetero-ˈaxial ˌhetero-ˈaxial adj. Brit. , U.S. [ < German heteroaxial (V. Goldschmidt Index d. Krystallformen d. Mineralien (1891) III. 136)] having a structure based on two axes or sets of axes; spec. of a geological feature: having an external symmetry that does not correspond with the symmetry of the individual components of the fabric.ΘΚΠ the world > the earth > structure of the earth > structural features > [adjective] > relative direction longitudinal1705 discordant1869 concordant1914 hetero-axial1926 1926 Mineral. Abstr. III. 186 A study of the directions of optical extinction in the lamellae, the striations on the faces, and the etch figures on the basal plane, leads to the conclusion that the twinning is of the ‘heteroaxial’ type. 1938 E. B. Knopf in Mem. Geol. Soc. Amer. VI. vi. 84 An example of heteroaxial orienting in two phases of the deformation is the fabric of certain pencil gneisses in which the symmetry of the grain fabric in the pencils does not conform with the fabric axes of the external form of the pencils. < as lemmas |
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