Endosmose, a word used in physics to describe the intermingling of two liquids of different densities, in close juxtaposition, but separated by a thin membranous tissue. The liquid of lesser density passes more rapidly through the dividing tissue, and raises the level of the liquid in the other vessel, this action is named endosmose; while the flowing of the liquid of greater density into the vessel whose level is falling, is called exosmose.