Dictionary.net

• the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off

2006 - WordNet 3.0
By Princeton University

• the concentration of a colloidal solution whose colloid will not pass through a semipermeable membrane; solution is placed in a bag of the membrane and the solvent is evaporated off

2011 - English Dictionary Database
By DataStellar Co., Ltd