scalenohedron

Noun

 * 1)  A polyhedron having twelve sides, each in the form of a scalene triangle, that is topologically equivalent to a hexagonal bipyramid and whose middle section can be said to inscribe a rhombohedron.
 * 2) * 1907, Benjamin K. Emerson, Joseph H. Perry, The Green Schists and Associated Granites and Porphyries of Rhode Island, US Geological Survey, Bulletin Number 311, page 24,
 * Other steep scalenohedrons of the principal zone are also often present, sometimes in addition to y, sometimes taking its place.
 * 1) * 1907, Benjamin K. Emerson, Joseph H. Perry, The Green Schists and Associated Granites and Porphyries of Rhode Island, US Geological Survey, Bulletin Number 311, page 24,
 * Other steep scalenohedrons of the principal zone are also often present, sometimes in addition to y, sometimes taking its place.