- The definition of a pycnometer is a tool used to measure the weight or density of a liquid.
An example of a pycnometer is a scientist's way of figuring out the weight of water.
pycnometer definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a vessel of a precise volume used to measure the density of liquids or solids
Origin: pycno- plush -meter
pycnometer definition by American Heritage Dictionary
A standard vessel used in measuring the density or specific gravity of materials.
Origin: Greek puknos, dense + -meter.