The Z-matrix is a structured way to represent the geometry of a molecule using internal coordinates rather than Cartesian coordinates. In a Z-matrix, the position of each atom is described by a combination of bond lengths, bond angles, and dihedral angles relative to other atoms in the molecule. This format inherently captures the connectivity and relative spatial arrangement of atoms, making it particularly useful for quantum chemistry calculations and molecular simulations. The Zmatrix naturally accommodates rotational and translational invariance, making it an efficient descriptor for capturing the essential structural features of molecules. Additionally, it simplifies the specification of molecular structures, especially when dealing with large systems or those with symmetrical properties. ULaMDyn provides quantities related to distances in angstroms, while features derived from angles are provided in degrees. Since the Z-Matrix module in ULaMDyn provides separate functions to compute bond distances, angles, dihedrals, or even bending angles (six atoms) to describe large out-of-plane motions, the user has the possibility of augmenting the standard Z-Matrix dataset by including other key variables relevant to the specific system/dynamics. In addition to the standard Z-Matrix, ULaMDyn also offers methods to compute variants of the Z-Matrix molecular descriptors: