| 单词 | tetrahedral angle |
| 释义 | > as lemmastetrahedral angle a. Having four sides (in addition to the base or ends); enclosed or contained laterally by four plane surfaces, as a tetrahedral prism or pyramid. tetrahedral angle, tetrahedral quoin, one bounded by four planes meeting at a common apex. ΘΚΠ the world > relative properties > number > geometry > shape or figure > [adjective] > three-dimensional > conical > pyramidal > tetrahedral tetrahedral1794 tetrahedrical1860 tetrahedric1890 tetrahedrid1895 tetrahedroid1899 1794 G. Adams Lect. Nat. & Exper. Philos. II. xiii. 43 The internal cavity is found to be lined with beautiful tetrahedral prisms. 1812 H. Davy Elements Chem. Philos. 124 Four particles may compose a tetrahedron, five a tetraedral pyramid, six an octaedron. 1828 J. Stark Elements Nat. Hist. II. 139 Body tetraedral, furrowed above. 1878 H. P. Gurney Crystallogr. 85 The tetrahedral quoins..of the rhombic dodecahedron. < as lemmas |
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