from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The passage of a fluid through a semipermeable membrane toward a solution of lower concentration, especially the passage of water through a cell membrane into the surrounding medium.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. osmosis in which fluid flows through a membrane towards a region of lower concentration
from the GNU version of the Collaborative International Dictionary of English
- n. See exosmose.
from The Century Dictionary and Cyclopedia
- n. The passage of gases, vapors, or liquids through membranes or porous media from within outward, in the phenomena of osmosis, the reverse process being called endosmosis. See endosmosis, osmosis.
ex(o)- + osmosis.(American Heritage® Dictionary of the English Language, Fourth Edition)
exo- + osmosis? (Wiktionary)