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A standard vessel used in measuring the density or specific gravity of materials.

[Greek puknos, dense + -meter.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Chemistry) a small glass bottle of known volume for determining the relative density of liquids and solids by weighing
Also: pyknometer
pycnometric adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(pɪkˈnɒm ɪ tər)

a container used for determining the density of a liquid or powder.
[1880–85; < Greek pykn(ós) dense]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


a container for measuring the density of liquids or solids.
See also: Instruments
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The volume of PE solid walls and closed cells in a sample [V.sub.m] was measured using a gas pycnometer (AccuPycII, Shimadzu, Kyoto, Japan) under nitrogen environment and porosity was calculated by Eq.
Being: Vs: total volume displaced by sample (mL), Ws: sample weight (g), Wp: weight of the empty pycnometer (g), Wpt: weight of the pycnometer filled with toluene (g), Wps: weight of the empty pycnometer with sample (g), Wpts: weight of the pycnometer filled with sample and toluene (g), [[rho].sub.tol (20[grados]C)] toluene density at 20[grados]C=0.8623 g/mL [15].
True volume of the samples (excluding pore volume) was measured using a pycnometer (Model Manual Multi-pycnometer; Qunatachrome, Florida, USA) using the fluid (nitrogen) displacement method.
The fuel densities were measured using a 25 ml capillary-stoppered pycnometer, with two replicates per sample.
The density was determined using a pycnometer of 25 ml, viscosity using the outflow velocity of fluids in capillary tubes at 40[degrees] C, the AV and PV by volumetric titrations and the FP using open device or the Marcusson flashpoint apparatus.
General physical and chemical properties were evaluated that included density (by pycnometer) using the standard IUPAC method 2.101, kinematic viscosity following ASTM method D445, while iodine value (Wij's method), refractive index (Abbe's refractometer), free fatty acid content (FFA %) and saponification number were determined following standard AOCS methods Cd 1-25, Cc 7-25, Ca 5a-40 and Cd 3-25, respectively.
With the pycnometer method as per standard ASTM D854, the specific gravity ([G.sub.s]) of the tailings was obtained:
The densities of the cured samples were determined in a pycnometer at 25[degrees]C, using water as the medium.
where [[rho].sub.Solid] is the solid density of the material (measured by He pycnometer method in equivalent crushed samples).
[14] ASTM, "Standard test methods for specific gravity of soil solids by water pycnometer: D854-02," in Annual Book of ASTM Standards, ASTM International, West Conshohocken, PA, USA, 2002.