mutuality of phases

mutuality of phases

[‚myü·chə′wal·əd·ē əv ′fāz·əz]
(chemistry)
The rule that if two phases, with respect to a reaction, are in equilibrium with a third phase at a certain temperature, then they are in equilibrium with respect to each other at that temperature.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.