D defs.my
Entry 1 sense Webster, 1913

osmosis

/(ŏz*mō"sĭs)/ · os·mo·sis · IPA /ɑzˈmoʊ̯sɪs/
01 n. The tendency in fluids to mix, or become equably diffused, when in contact. It was first observed between fluids of differing densities, an…
  1. 1.
    The tendency in fluids to mix, or become equably diffused, when in contact. It was first observed between fluids of differing densities, and as taking place through a membrane or an intervening porous structure. An older term for the phenomenon was Osmose.(Chemical Physics) Also: Osmose