distribution coefficient

https://doi.org/10.1351/goldbook.D01812
The term is not recommended as a synonym for the latter.
See:
distribution constant
,
distribution ratio (in liquid-liquid distribution)
Source:
PAC, 1993, 65, 2373. (Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)) on page 2381 [Terms] [Paper]