Literally '
fat-loving'. Applied to molecular entities (or parts of molecular entities) having a tendency
to dissolve in fat-like (e.g. hydrocarbon) solvents.
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1136
PAC, 1972, 31, 577
(Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix
II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry)
on page 607