Gaussian Orbital
In computational chemistry and molecular physics, Gaussian orbitals (also known as Gaussian type orbitals, GTOs or Gaussians) are functions used as atomic orbitals in the LCAO method for the computation of electron orbitals in molecules and numerous properties that depend on these.
Read more about Gaussian Orbital: Rationale, Using Tables of Gaussian Orbitals, Molecular Integrals, The POLYATOM System