In geometry, a scalenohedron is a polyhedron containing three or more pairs of mutually congruent scalene triangles as faces. ...
• (n.) A pyramidal form under the rhombohedral system, inclosed by twelve faces, each a scalene triangle.
Six sided polyhedron, similar to a bipyramidal hexagon, but the adjoining area at the center is diagonal between every side as opposed to being level. Other modifications might be present. Minerals shape this way are scalenohedral.
Sca·le`no·he'dron (-drŏn) noun [ Greek 
scalenohedron A hemihedral crystal form of eight or twelve faces, each face being a scalene triangle.