plural of disphenoid

(mineralogy) Of or pertaining to a wedge-shaped crystal form of the tetragonal or orthorhombic system.

(geometry) A non-regular tetrahedron whose four faces are congruent acute-angled triangles.

Having the form of a disphenoid.

plural of snub disphenoid

A non-regular convex polyhedron that has 12 equilateral triangles as faces and 18 edges and is a Johnson solid.