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bipyramid

[ bahy-pir-uh-mid ]

noun

, Crystallography.
  1. a form symmetrical about a plane dividing it into two pyramids.


bipyramid

/ ˌbaɪˈpɪrəmɪd /

noun

  1. a geometrical form consisting of two pyramids with a common polygonal base


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Other Words From

  • bi·py·ram·i·dal [bahy-pi-, ram, -i-dl], adjective

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Word History and Origins

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Example Sentences

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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