ligand field splitting
The removal of a @D01556@ of atomic or molecular levels in a molecule or ion with a given symmetry, induced by the @A00512@ or removal of @L03518@ to produce reduced symmetries.
crystal field splitting
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2251 [Terms] [Paper]