|dī+ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷ adjective
Etymology: International Scientific Vocabulary di- + tetragonal
1. : relating to or being a prism in the tetragonal system that has eight similar faces whose alternate interfacial angles only are equal ; also : relating to or being a pyramid corresponding to such a prism
2. : relating to or being a type of symmetry that requires a ditetragonal pyramid or dipyramid