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disphenoid

The English word “disphenoid” has 3 meanings listed here.

adjective

  1. Of or pertaining to a wedge-shaped crystal form of the tetragonal or orthorhombic system.
  2. Of or pertaining to a crystal form bounded by eight scalene triangles arranged in pairs, constituting a tetragonal scalenohedron.

noun

  1. A non-regular tetrahedron whose four faces are congruent acute-angled triangles.

Etymology

From di- (“twice, double”) + sphenoid (“wedge-shaped crystal or bone of the skull”).

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.