The separation into two liquid phases in @C01172@ systems. The phase more concentrated in @C01171@ component is the coacervate, and the other phase is the equilibrium solution.
Source: 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 611 [Terms] [Paper]