Function centered on an atom of the form
\(\phi(r) \propto x^{i} y^{j} z^{k} \exp (-\zeta r^{2})\), used to approximate atomic orbitals in the LCAO-MO method.
Source:
PAC, 2022, 94, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 424 (https://doi.org/10.1515/pac-2018-1010)