bipyramid
/bahy-pir-uh-mid/US // baɪˈpɪr ə mɪd //UK // (ˌbaɪˈpɪrəmɪd) //
双锥体,双金字塔,双子塔,双子座
Definitions
n.名词 noun
- 1
Crystallography.
- : a form symmetrical about a plane dividing it into two pyramids.
Examples
Hexagonal bipyramid (fig. 70), bounded by twelve isosceles triangles each of which are equally inclined to two planes of symmetry.
The general form is bounded by twelve scalene triangles and is a ditrigonal bipyramid.
It may be considered as the hemihedral form of the ditetragonal bipyramid.
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