In the three-body term V 3 the interatomic distance r j k is not needed since the three terms r i j , r i k , θ θ i j k are sufficient to give the relative positions of three atoms i , j , k in three-dimensional space. Any terms of order higher than 2 are also called many-body potentials. In some interatomic potentials the many-body interactions are embedded into the terms of a pair potential (see discussion on EAM-like and bond order potentials below).