The water level rises on the side containing more sugar molecules by passing through the semipermeable membrane.
An example of semipermeable is a selectively permeable membrane.
- Partially permeable.
- Allowing passage of certain, especially small, molecules or ions but acting as a barrier to others. Used of biological and synthetic membranes.
(comparative more semipermeable, superlative most semipermeable)
- Permeable to some things and not to others, as a cell membrane which allows some molecules through but blocks others substances.
- Further, in the free surface the solutions of an involatile solute in a volatile solvent, through which surface the vapour of the solvent alone can pass, and in the boundary of a crystal of pure ice in a solution, we have actual surfaces which are in effect perfectly semipermeable.
- If solvent be allowed to enter through a semipermeable wall into an engine cylinder, the work done when the solution within is already dilute will be the same whatever the nature of the interaction between solute and solvent, that is, whatever be the nature of the solvent itself.