Dyn.¹

Brit.

/ˌdiːˈwʌɪ/, U.S.

/ˌdiˈwaɪ/

Origin: Formed within English, by clipping or shortening. Etymon: dysprosium n.

Etymology: Symbolic abbreviation for dysprosium n.

Chemistry.

The element dysprosium.

ΚΠ

1886 Chem. News 4 June 265/1 The author [sc. L. de Boisbaudran] proposes..to call the metal giving the bands 753 and 451·5 dysprosium (Dy).

1924 J. W. Mellor Comprehensive Treat. Inorg. & Theoret. Chem. V. xxxviii. 696 The four rare earth elements—dysprosium, Dy; holmium, Ho; erbium, Er; and thulium, Tm—are considered as a family or sub-group of the yttrium elements.

1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xxx. 1439 Like CaI₂, the diiodides of Dy, Tm and Yb form layer structures.

2013 Jrnl. Luminescence 136 192/2 At this wavelength the emission spectra for different concentrations (1 mol% for Ce and 0.1, 0.2 and 0.5 mol% for Dy) are observed.

This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022).

dyn.²

/dʌɪ/

Etymology: < Swedish dy mire, ooze (H. von Post 1862, in K. Sven. Vetenskaps-Akad. Handl. 1), < Old Norse dý , perhaps < Germanic *dunhia , related to *dungia , the antecedent of Old English dung dung n.¹ (see Falk and Torp); but the etymology of the Old Norse word is disputed.

A type of sediment rich in organic matter deposited in unproductive lakes.

ΚΠ

1936 S. A. Waksman Humus iv. 66 Formation of ‘dy’, or colloidal humus material, in environments supplying amounts of air that are limited as a result of water cover.

1939 W. H. Twenhofel Princ. Sedimentation ii. 88 Black muds..have been differentiated into gyttja..and dy if the organic matter was brought to the lakes in colloidal form.

1957 G. E. Hutchinson Treat. Limnol. I. xvii. 882 The distinction between autochthonous (gyttja) and allochthonous (dy) organic sediments was early made by the Swedish students of sedimentation.

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2018).

单词	dy
释义	Dyn.¹ Brit. /ˌdiːˈwʌɪ/, U.S. /ˌdiˈwaɪ/ Origin: Formed within English, by clipping or shortening. Etymon: dysprosium n. Etymology: Symbolic abbreviation for dysprosium n. Chemistry. The element dysprosium. ΚΠ 1886 Chem. News 4 June 265/1 The author [sc. L. de Boisbaudran] proposes..to call the metal giving the bands 753 and 451·5 dysprosium (Dy). 1924 J. W. Mellor Comprehensive Treat. Inorg. & Theoret. Chem. V. xxxviii. 696 The four rare earth elements—dysprosium, Dy; holmium, Ho; erbium, Er; and thulium, Tm—are considered as a family or sub-group of the yttrium elements. 1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xxx. 1439 Like CaI₂, the diiodides of Dy, Tm and Yb form layer structures. 2013 Jrnl. Luminescence 136 192/2 At this wavelength the emission spectra for different concentrations (1 mol% for Ce and 0.1, 0.2 and 0.5 mol% for Dy) are observed. This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022). dyn.² /dʌɪ/ Etymology: < Swedish dy mire, ooze (H. von Post 1862, in K. Sven. Vetenskaps-Akad. Handl. 1), < Old Norse dý , perhaps < Germanic dunhia , related to dungia , the antecedent of Old English dung dung n.¹ (see Falk and Torp); but the etymology of the Old Norse word is disputed. A type of sediment rich in organic matter deposited in unproductive lakes. ΚΠ 1936 S. A. Waksman Humus iv. 66 Formation of ‘dy’, or colloidal humus material, in environments supplying amounts of air that are limited as a result of water cover. 1939 W. H. Twenhofel Princ. Sedimentation ii. 88 Black muds..have been differentiated into gyttja..and dy if the organic matter was brought to the lakes in colloidal form. 1957 G. E. Hutchinson Treat. Limnol. I. xvii. 882 The distinction between autochthonous (gyttja) and allochthonous (dy) organic sediments was early made by the Swedish students of sedimentation. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2018). < n.¹1886n.²1936
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Dyn.1

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Dyn.¹

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