pycnometern.

Brit.

/pɪkˈnɒmᵻtə/, U.S.

/pɪkˈnɑmədər/

Forms: 1800s– pycnometer, 1800s– pyknometer.

Origin: Formed within English, by compounding. Etymons: pycno- comb. form, -meter comb. form².

Etymology: < pycno- comb. form + -meter comb. form². Compare German Pyknometer (1860 or earlier).

Science.

A container used for finding the relative density of a liquid by measuring its weight when filled with the liquid and comparing it with the weight when filled with water.Ostwald pycnometer: see Ostwald n. 2.

ΘΚΠ

the world > matter > constitution of matter > density or solidity > [noun] > specific gravity > device to measure specific gravity > of liquids

waterpoise1660

hydrometer1675

citrometer1823

litrameter1826

Twaddell1853

pycnometer1858

specific gravity beads (also bulbs)1863

1858 J. L. W. Thudichum Treat. Pathol. Urine 33 The weight of the urine required to fill the pycnometer is then ascertained.

1881 Nature 28 July 294/1 The specific gravity bottle or pyknometer.

1927 Amer. Jrnl. Bot. 14 454 The calculation of the molar stock solution..was checked by the precision hydrometer and also by the pycnometer.

1989 R. Dryer & G. Lata Exper. Biochem. i. viii. 200 The ultimate method for calibration is to weigh a known volume of a solution and thus to determine its density. Small pycnometers are available for this purpose.

Derivatives

ˌpycnoˈmetric adj. involving or employing a pycnometer.

ΘΚΠ

the world > matter > constitution of matter > density or solidity > [adjective] > relating to measurement of specific gravity > specific instruments for measuring

hydrometrical1780

hydrometric1828

pycnometric1898

1898 W. L. Hardin tr. J. Traube Physico-chem. Methods ii. 16 The pyknometric method gives far less accurate results for solids than for liquids.

1940 T. B. Crumpler & J. H. Yoe Chem. Computations & Errors vii. 116 For more exact corrections, pycnometric studies of the given solution need to be made.

1987 Jrnl. Biomed. Materials Res. 21 11 The weight and volume fractions of inorganic fillers were determined by combustion and pycnometric analyses.

ˌpycnoˈmetrically adv. by means of a pycnometer.

ΘΚΠ

the world > matter > constitution of matter > density or solidity > [adverb] > in respect of specific gravity > measurement by specific instrument

pycnometrically1927

1927 Jrnl. Amer. Chem. Soc. 49 2928 Partial specific volume is determined pycnometrically.

1976 Nature 3 June 438/3 There is a reasonable agreement between X-ray and pycnometrically determined densities in the minerals of the oldest rocks.

1992 Biogeochemistry 16 186 Particle density was measured pycnometrically.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	pycnometer
释义	pycnometern. Brit. /pɪkˈnɒmᵻtə/, U.S. /pɪkˈnɑmədər/ Forms: 1800s– pycnometer, 1800s– pyknometer. Origin: Formed within English, by compounding. Etymons: pycno- comb. form, -meter comb. form². Etymology: < pycno- comb. form + -meter comb. form². Compare German Pyknometer (1860 or earlier). Science. A container used for finding the relative density of a liquid by measuring its weight when filled with the liquid and comparing it with the weight when filled with water.Ostwald pycnometer: see Ostwald n. 2. ΘΚΠ the world > matter > constitution of matter > density or solidity > [noun] > specific gravity > device to measure specific gravity > of liquids waterpoise1660 hydrometer1675 citrometer1823 litrameter1826 Twaddell1853 pycnometer1858 specific gravity beads (also bulbs)1863 1858 J. L. W. Thudichum Treat. Pathol. Urine 33 The weight of the urine required to fill the pycnometer is then ascertained. 1881 Nature 28 July 294/1 The specific gravity bottle or pyknometer. 1927 Amer. Jrnl. Bot. 14 454 The calculation of the molar stock solution..was checked by the precision hydrometer and also by the pycnometer. 1989 R. Dryer & G. Lata Exper. Biochem. i. viii. 200 The ultimate method for calibration is to weigh a known volume of a solution and thus to determine its density. Small pycnometers are available for this purpose. Derivatives ˌpycnoˈmetric adj. involving or employing a pycnometer. ΘΚΠ the world > matter > constitution of matter > density or solidity > [adjective] > relating to measurement of specific gravity > specific instruments for measuring hydrometrical1780 hydrometric1828 pycnometric1898 1898 W. L. Hardin tr. J. Traube Physico-chem. Methods ii. 16 The pyknometric method gives far less accurate results for solids than for liquids. 1940 T. B. Crumpler & J. H. Yoe Chem. Computations & Errors vii. 116 For more exact corrections, pycnometric studies of the given solution need to be made. 1987 Jrnl. Biomed. Materials Res. 21 11 The weight and volume fractions of inorganic fillers were determined by combustion and pycnometric analyses. ˌpycnoˈmetrically adv. by means of a pycnometer. ΘΚΠ the world > matter > constitution of matter > density or solidity > [adverb] > in respect of specific gravity > measurement by specific instrument pycnometrically1927 1927 Jrnl. Amer. Chem. Soc. 49 2928 Partial specific volume is determined pycnometrically. 1976 Nature 3 June 438/3 There is a reasonable agreement between X-ray and pycnometrically determined densities in the minerals of the oldest rocks. 1992 Biogeochemistry 16 186 Particle density was measured pycnometrically. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1858
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