vapor-pressure osmometer

vapor-pressure osmometer

[′vā·pər ¦presh·ər äz′mäm·əd·ər]
(analytical chemistry)
A device for the determination of molecular weights by the decrease of vapor pressure of a solvent upon addition of a soluble sample.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.