from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Partially permeable.
- adj. Allowing passage of certain, especially small, molecules or ions but acting as a barrier to others. Used of biological and synthetic membranes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Describing something that is permeable to some things and not to others, as a cell membrane which allows some molecules through but blocks others substances.
from The Century Dictionary and Cyclopedia
- Capable of permitting the passage of certain molecules and of impeding that of others; said of membranes or septa which are permeable to the molecules of a solvent such as water, but which prevent the diffusion of the molecules of the dissolved substance.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (of a membrane) selectively permeable
Sorry, no etymologies found.