tetragonal
adj/tɛˈtɹæɡənəl/
Etymology From tetragon + -al.
1
Having four sides, like a tetragon.
2
Chemistry, Crystallography, Natural sciences, Physical sciences Having two equal axes and one unequal, and all angles 90°.
- The eight normals of the tetragonal scalenohedron may carry the eight faces of a semiform in other ways than asymmetrically as regards the systematic planes.1895, Nevil Story-Maskelyne, Crystallography: A Treatise on the Morphology of Crystals, page 255:
- Derived terms
- ditetragonal, nontetragonal, tetragonal disphenoid, tetragonality, tetragonally
- Coordinate terms
- triclinic, monoclinic, orthorhombic, hexagonal, rhombohedral, cubic