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单词 trapezohedron
释义
trapezohedron

Geology and Earth Sciences
  • A crystal form where the faces are in the shape of a trapezoid with four sides, none of which are parallel. It is developed in the cubic, tetragonal, and hexagonal crystal systems, to give a closed form similar in shape to a pyramid. It can be referred to the normal axes of symmetry but frequently lacks a horizontal plane of symmetry.


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