osmotic

adj. of osmosis; of permeation; of diffusion

Osmosis is the net movement of water across a partially permeable membrane from a region of high solvent potential to an area of low solvent potential, up a solute concentration gradient.It is a physical process in which a solvent moves, without input of energy, across a semi permeable membrane (permeable to the solvent, but not the solute) separating two solutions of different concentrations. Osmosis releases energy, and can be made to do work, as when a growing tree-root splits a stone.
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Osmotic, adj pertaining to osmosis. osmotic pressure, n See pressure, osmotic. osmotic emanating from or pertaining to the pressure of osmosis. [more]Osmotic - Community and Resources

Adjective
1. of or relating to osmosis; "osmotic pressure"
(pertainym) osmosis

(a.)
Pertaining to, or having the property of, osmose; as, osmotic force.