from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A rhombohedral polyhedron having twelve sides, each in the form of a scalene triangle

from the GNU version of the Collaborative International Dictionary of English

  • n. A pyramidal form under the rhombohedral system, inclosed by twelve faces, each a scalene triangle.

from The Century Dictionary and Cyclopedia

  • n. In crystallography, a twelve-sided form under the rhombohedral division of the hexagonal system, in which the faces are scalene triangles. It is regarded as a hemihedral form of the double twelve-sided pyramid. See hemihedral.


Sorry, no etymologies found.



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