Clinotropic material
In solid mechanics and elasticity, clinotropy (from Ancient Greek κλίνειν (klínein) 'to incline', and τροπή (tropḗ) 'twist') or oblique anisotropy refers to the property of certain anisotropic materials where no two or more perpendicular planes of symmetry can be found, indicating that they typically possess less symmetry than orthotropic materials. A clinotropic material is a type of material exhibiting clinotropy, whose mechanical properties—such as stiffness or strength—depend on direction, but in a more complex way than in other directional materials.