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.