Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. separating
6. dispersion (process)
7. diffusion

Anotations

Scope note:

Movement of molecules of a liquid through a semipermeable membrane from a region of high solute concentration into a less concentrated field; a reversal of normal flow that occurs when hydrostatic pressure exceeds the osmotic pressure.