Antiferrodistortion, commonly abbreviated as AFD, is a property seen in certain types of solid materials where the atomic positions are distorted. Some synonyms for antiferrodistortion include antiferroic distortion, antiferromagnetic distortion, and antipolar distortion. These terms describe the same phenomenon where two types of atoms in a material have opposite magnetic polarizations and the distortion alters their arrangement. This can have significant effects on the material's properties and behavior. Other related terms include ferrodistortion and ferroelectric distortion, which describe the opposite situation where the atomic positions are distorted but lead to the alignment of the material's magnetic or electric fields. Understanding these properties is crucial for materials science and designing new materials for various applications.