A standard vessel used in measuring the density or specific gravity of materials.
A vessel of a precise volume used to measure the density of liquids or solids.
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.
Origin of pycnometer
From the Greek: Ï€Ï…ÎºÎ½ÏŒÏ‚ (puknos) meaning dense