radiometricadj.

Brit.

/ˌreɪdɪəˈmɛtrɪk/, U.S.

/ˌreɪdiəˈmɛtrɪk/

Origin: Formed within English, by compounding. Etymons: radio- comb. form², -metric comb. form.

Etymology: < radio- comb. form² + -metric comb. form, after radiometer n.² Compare French radiométrique (1878; 1832 in sense ‘of or relating to a radiometer (radiometer n.¹ 1)’.

1. Relating to or involving the measurement of the energy or power of electromagnetic radiation. Originally: of or relating to Crookes's radiometer (radiometer n.² 1a); (of a force) of the kind exemplified in this device. Now usually more widely: of or relating to a radiometer (radiometer n.² 1b), esp. as used to measure the intensity or spectral distribution of light or other radiant energy.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > [adjective] > relating to radiometer

radiometric1877

the world > matter > physics > mechanics > dynamics > thermodynamics > [adjective] > relating to radiometry

radiometric1877

1877 Chem. News 12 Jan. 21/2 (heading) New radiometric experiments.

1883 Athenæum 10 Feb. 189/2 The effects of all the different parts of the radiometric apparatus in influencing radiometer motion.

1905 Proc. Royal Soc. A. 76 456 There were considerable apparent variations in weight... They were almost certainly due to radiometric forces or to other gas action.

1912 Amer. Jrnl. Psychol. 23 328 (title) A note on the determination of the retina's sensitivity to colored light in terms of radiometric units.

1964 Yearbk. Astron. 1965 111 For Mars, information about ground temperatures may be obtained from radiometric observations.

1977 A. Hallam Planet Earth 111 Magnetic, electromagnetic and radiometric techniques are commonly adapted to airborne surveys.

1999 Engineering Nov. 82/1 Accurate, drift-free industrial radiometric imaging and temperature measurement from −20 to 2000°C.

2. Relating to, obtained by, or involving the measurement of radioactivity or ionizing radiation.

ΘΚΠ

the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [adjective]

radiometric1906

1906 Sci. Abstr. A. 9 50 Sabouraud and Noiré..point out that their radiometric value is not in any way diminished.

1938 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity (ed. 2) xviii. 169 This method of ‘Radiometric Microanalysis’ has rendered it possible..to carry out a determination of the nitrogen content of organic substances to the order of magnitude of some ten-thousandths of a milligram.

1951 Engineering 2 Feb. 148/1 Radiometric methods are frequently used in the investigation of uranium-bearing minerals.

1972 Science 2 June 977/1 Radiometric ages obtained for the Apollo 14 examples..cluster around a value of 3.9 × 10⁹ years.

1998 S. C. Morris Crucible of Creation p. xvi Objective geological time is measured by radiometric methods that assume (reasonably) that decay constants of radioactive isotopes remain unchanged.

Compounds

radiometric dating n. dating that makes use of the varying relative abundances over time of radioactive parent and daughter isotopes (as in radiocarbon dating).

ΘΚΠ

the world > time > reckoning of time > chronology > [noun] > assignment to a time or dating > dating methods

fluorine test1895

cross-dating1939

age dating1941

carbon–14 dating1950

radiocarbon dating1950

carbon dating1952

radiodating1962

radiometric dating1963

TL-dating1972

1963 Q. Jrnl. Geol. Soc. 119 137 The rocks concerned range in age from 1055 to 1700 m.y. (radiometric dating), spanning more time than the whole of the Phanerozoic.

1998 Guardian 18 Dec. i. 15/6 The fossils, together with radiometric dating, provide hard evidence of extremely warm temperatures in the Arctic.

radiometric magnitude n. Astronomy a measure of the intensity of the total radiation emitted by a celestial object that reaches the earth's surface, typically expressed on a scale in which zero is the visual magnitude of a type A0 star.

ΚΠ

1922 E. Pettit & S. B. Nicholson in Publ. Astron. Soc. Pacific 34 182 In the sixth column of the table these deflections are given in terms of radiometric magnitude, which for convenience, we shall define as the magnitude of a typical A0 star which would give the deflection observed.

1934 R. C. Tolman Relativity, Thermodynamics & Cosmol. iv. 449 Δm_r is the empirical correction to be added to the bolometric magnitude to obtain the radiometric magnitude as measured thermally after absorption by the earth's atmosphere.

1995 D. Leverington Hist. Astron. (1996) xiv. 305 For these very red stars,..a heat index was devised in the 1920s, that was the difference between the visual and radiometric magnitudes of the stars.

Derivatives

ˌradioˈmetrically adv. by a radiometric method.

ΘΚΠ

the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [adverb]

radiometrically1909

1909 Science 12 Mar. 432/2 The method shall enable the experimenter..to measure the intensity of stimuli accurately and easily both photometrically and radiometrically.

1920 Jrnl. Franklin Inst. 189 27 The energy was determined..with a radiometrically calibrated Mazda lamp.

1962 F. P. W. Winteringham in Radioisotopes & Radiation in Entomol. (Internat. Atomic Energy Agency) 117 P³² and S³⁵ are readily differentiated radiometrically.

1988 Proc. SPIE (Internat. Soc. Optical Engin.) 936 76 Crosstalk was visualized and measured radiometrically in a Schlieren imaging setup.

2002 L. A. Witham Where Darwin meets Bible vi. 106 He pulls from his desk drawer a CD that contains the National Geophysical Data Center's list of all rock ages dated radiometrically in private and public laboratories.

This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).

单词	radiometric
释义	radiometricadj. Brit. /ˌreɪdɪəˈmɛtrɪk/, U.S. /ˌreɪdiəˈmɛtrɪk/ Origin: Formed within English, by compounding. Etymons: radio- comb. form², -metric comb. form. Etymology: < radio- comb. form² + -metric comb. form, after radiometer n.² Compare French radiométrique (1878; 1832 in sense ‘of or relating to a radiometer (radiometer n.¹ 1)’. 1. Relating to or involving the measurement of the energy or power of electromagnetic radiation. Originally: of or relating to Crookes's radiometer (radiometer n.² 1a); (of a force) of the kind exemplified in this device. Now usually more widely: of or relating to a radiometer (radiometer n.² 1b), esp. as used to measure the intensity or spectral distribution of light or other radiant energy. ΘΚΠ the world > matter > physics > electromagnetic radiation > [adjective] > relating to radiometer radiometric1877 the world > matter > physics > mechanics > dynamics > thermodynamics > [adjective] > relating to radiometry radiometric1877 1877 Chem. News 12 Jan. 21/2 (heading) New radiometric experiments. 1883 Athenæum 10 Feb. 189/2 The effects of all the different parts of the radiometric apparatus in influencing radiometer motion. 1905 Proc. Royal Soc. A. 76 456 There were considerable apparent variations in weight... They were almost certainly due to radiometric forces or to other gas action. 1912 Amer. Jrnl. Psychol. 23 328 (title) A note on the determination of the retina's sensitivity to colored light in terms of radiometric units. 1964 Yearbk. Astron. 1965 111 For Mars, information about ground temperatures may be obtained from radiometric observations. 1977 A. Hallam Planet Earth 111 Magnetic, electromagnetic and radiometric techniques are commonly adapted to airborne surveys. 1999 Engineering Nov. 82/1 Accurate, drift-free industrial radiometric imaging and temperature measurement from −20 to 2000°C. 2. Relating to, obtained by, or involving the measurement of radioactivity or ionizing radiation. ΘΚΠ the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [adjective] radiometric1906 1906 Sci. Abstr. A. 9 50 Sabouraud and Noiré..point out that their radiometric value is not in any way diminished. 1938 R. W. Lawson tr. G. von Hevesy & F. A. Paneth Man. Radioactivity (ed. 2) xviii. 169 This method of ‘Radiometric Microanalysis’ has rendered it possible..to carry out a determination of the nitrogen content of organic substances to the order of magnitude of some ten-thousandths of a milligram. 1951 Engineering 2 Feb. 148/1 Radiometric methods are frequently used in the investigation of uranium-bearing minerals. 1972 Science 2 June 977/1 Radiometric ages obtained for the Apollo 14 examples..cluster around a value of 3.9 × 10⁹ years. 1998 S. C. Morris Crucible of Creation p. xvi Objective geological time is measured by radiometric methods that assume (reasonably) that decay constants of radioactive isotopes remain unchanged. Compounds radiometric dating n. dating that makes use of the varying relative abundances over time of radioactive parent and daughter isotopes (as in radiocarbon dating). ΘΚΠ the world > time > reckoning of time > chronology > [noun] > assignment to a time or dating > dating methods fluorine test1895 cross-dating1939 age dating1941 carbon–14 dating1950 radiocarbon dating1950 carbon dating1952 radiodating1962 radiometric dating1963 TL-dating1972 1963 Q. Jrnl. Geol. Soc. 119 137 The rocks concerned range in age from 1055 to 1700 m.y. (radiometric dating), spanning more time than the whole of the Phanerozoic. 1998 Guardian 18 Dec. i. 15/6 The fossils, together with radiometric dating, provide hard evidence of extremely warm temperatures in the Arctic. radiometric magnitude n. Astronomy a measure of the intensity of the total radiation emitted by a celestial object that reaches the earth's surface, typically expressed on a scale in which zero is the visual magnitude of a type A0 star. ΚΠ 1922 E. Pettit & S. B. Nicholson in Publ. Astron. Soc. Pacific 34 182 In the sixth column of the table these deflections are given in terms of radiometric magnitude, which for convenience, we shall define as the magnitude of a typical A0 star which would give the deflection observed. 1934 R. C. Tolman Relativity, Thermodynamics & Cosmol. iv. 449 Δm_r is the empirical correction to be added to the bolometric magnitude to obtain the radiometric magnitude as measured thermally after absorption by the earth's atmosphere. 1995 D. Leverington Hist. Astron. (1996) xiv. 305 For these very red stars,..a heat index was devised in the 1920s, that was the difference between the visual and radiometric magnitudes of the stars. Derivatives ˌradioˈmetrically adv. by a radiometric method. ΘΚΠ the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [adverb] radiometrically1909 1909 Science 12 Mar. 432/2 The method shall enable the experimenter..to measure the intensity of stimuli accurately and easily both photometrically and radiometrically. 1920 Jrnl. Franklin Inst. 189 27 The energy was determined..with a radiometrically calibrated Mazda lamp. 1962 F. P. W. Winteringham in Radioisotopes & Radiation in Entomol. (Internat. Atomic Energy Agency) 117 P³² and S³⁵ are readily differentiated radiometrically. 1988 Proc. SPIE (Internat. Soc. Optical Engin.) 936 76 Crosstalk was visualized and measured radiometrically in a Schlieren imaging setup. 2002 L. A. Witham Where Darwin meets Bible vi. 106 He pulls from his desk drawer a CD that contains the National Geophysical Data Center's list of all rock ages dated radiometrically in private and public laboratories. This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022). < adj.1877
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