micronn.

Brit.

/ˈmʌɪkrɒn/, U.S.

/ˈmaɪˌkrɑn/

Inflections: Plural micra, microns.

Forms: 1800s mikron, 1800s– micron.

Origin: A borrowing from German. Etymon: German Mikron.

Etymology: < German Mikron (J. B. Listing 1869, in Repertorium f. Experimental-Physik 5 5) < ancient Greek μικρόν , neuter of μικρός small (see micro- comb. form).The term was adopted by Le Comité International des Poids et Mesures in 1879:1880 Procès-Verbaux des Séances du Comité Internat. des Poids et Mesures 1879 41 Le Comité international des Poids et Mesures adopte, pour ses publications et son usage officiel, le système suivant des signes abréviatifs pour les poids et mesures métriques... (table) Mesures de longueur... Micron... μ.

One millionth of a metre; = micrometre n. Symbol μ or μm.In the International System of Units the word has been replaced by micrometre n.

ΘΚΠ

the world > relative properties > measurement > measurement of length > [noun] > units of length or distance > metre > the millionth part of a metre

micron1879

micrometre1880

mu1888

mikrom1898

1879 Amer. Jrnl. Math. 2 338 A real solar spectrum is thrown on the slit-plate, of such purity that the light admitted into the slit varies only by a few ten-thousandths of a micron in wave-length.

1883 Science 24 Aug. 250/2 According to his [sc. Dr. Pernet's] report, this metre is 310 mikrons too short.

1885 Jrnl. Royal Microsc. Soc. 5 140 Proposal..(2) to use micron in place of micromillimetre.

1898 Ld. Kelvin in Rep. Brit. Assoc. 783 Measured wave-lengths as great as 15 mikrons in radiant heat.

1905 Brit. Med. Jrnl. 25 Feb. 404 The lymphocytes showed all variations in size, from the smallest to some which were 15 microns in diameter.

1936 J. Krafka Textbk. Histol. viii. 43 The axon is usually..1 to 2 micra in diameter.

1966 Electronics 14 Nov. 25 The detector..is believed to be the first photovoltaic detector of infrared radiation in the 8- to 14-micron range.

1968 J. E. Gordon New Sci. Strong Materials i. 23 One micron is around the limit of resolution in optical microscopes.

1981 L. Anderson in K. Thear & A. Fraser Compl. Bk. Raising Livestock & Poultry v. 105/2 A simpler method of assessment now being used by some sections of the wool-buying trade is by the diameter of the wool fibre itself, measured in microns. On this calculation Merino wool measurements range from 17 microns (84s on the Bradford scale),..to about 23 microns (60s).

1992 Sci. Amer. Nov. 75/3 The technique is called surface micromachining because it deposits a film of silicon a few microns thick.

This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022).

单词	micron
释义	micronn. Brit. /ˈmʌɪkrɒn/, U.S. /ˈmaɪˌkrɑn/ Inflections: Plural micra, microns. Forms: 1800s mikron, 1800s– micron. Origin: A borrowing from German. Etymon: German Mikron. Etymology: < German Mikron (J. B. Listing 1869, in Repertorium f. Experimental-Physik 5 5) < ancient Greek μικρόν , neuter of μικρός small (see micro- comb. form).The term was adopted by Le Comité International des Poids et Mesures in 1879:1880 Procès-Verbaux des Séances du Comité Internat. des Poids et Mesures 1879 41 Le Comité international des Poids et Mesures adopte, pour ses publications et son usage officiel, le système suivant des signes abréviatifs pour les poids et mesures métriques... (table) Mesures de longueur... Micron... μ. One millionth of a metre; = micrometre n. Symbol μ or μm.In the International System of Units the word has been replaced by micrometre n. ΘΚΠ the world > relative properties > measurement > measurement of length > [noun] > units of length or distance > metre > the millionth part of a metre micron1879 micrometre1880 mu1888 mikrom1898 1879 Amer. Jrnl. Math. 2 338 A real solar spectrum is thrown on the slit-plate, of such purity that the light admitted into the slit varies only by a few ten-thousandths of a micron in wave-length. 1883 Science 24 Aug. 250/2 According to his [sc. Dr. Pernet's] report, this metre is 310 mikrons too short. 1885 Jrnl. Royal Microsc. Soc. 5 140 Proposal..(2) to use micron in place of micromillimetre. 1898 Ld. Kelvin in Rep. Brit. Assoc. 783 Measured wave-lengths as great as 15 mikrons in radiant heat. 1905 Brit. Med. Jrnl. 25 Feb. 404 The lymphocytes showed all variations in size, from the smallest to some which were 15 microns in diameter. 1936 J. Krafka Textbk. Histol. viii. 43 The axon is usually..1 to 2 micra in diameter. 1966 Electronics 14 Nov. 25 The detector..is believed to be the first photovoltaic detector of infrared radiation in the 8- to 14-micron range. 1968 J. E. Gordon New Sci. Strong Materials i. 23 One micron is around the limit of resolution in optical microscopes. 1981 L. Anderson in K. Thear & A. Fraser Compl. Bk. Raising Livestock & Poultry v. 105/2 A simpler method of assessment now being used by some sections of the wool-buying trade is by the diameter of the wool fibre itself, measured in microns. On this calculation Merino wool measurements range from 17 microns (84s on the Bradford scale),..to about 23 microns (60s). 1992 Sci. Amer. Nov. 75/3 The technique is called surface micromachining because it deposits a film of silicon a few microns thick. This entry has been updated (OED Third Edition, December 2001; most recently modified version published online March 2022). < n.1879
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