Pdn.

Brit.

/piːˈdiː/, U.S.

/piˈdi/

Origin: Formed within English, by clipping or shortening. Etymon: palladium n.²

Etymology: Symbolic abbreviation for palladium n.²

Chemistry.

The element palladium.

ΚΠ

1833 E. Turner Elements of Chem. (ed. 4) 971 Palladium..Pd.

1867 C. L. Bloxam Chem. 400 Of the oxides of palladium, two correspond with those of platinum, and a basic suboxide (Pd₂O) has been obtained by gently heating the protoxide.

1922 T. M. Lowry Inorg. Chem. xlii. 820 Palladium, Pd = 106.7, was discovered by Wollaston.

1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) xix. 924 Palladium(II) acetate..is used as a source for other Pd compounds and has been greatly studied in a wide variety of Pd catalyzed reactions of organic compounds.

1993 Nature 1 Apr. 436/2 At 300 K, the atomic structure of pure Pd..is very regular and contains no explicit indication of where a crack might start forming.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

> as lemmas

P.D. n. preventive detention; preventive detainee.

ΘΚΠ

society > law > administration of justice > general proceedings > arrest > [noun] > custody > type of

free keeping1483

free ward1538

bail1581

preventive detention1858

preventive custody1897

P.D.1956

1956 ‘C. Raven’ Underworld Nights 30 The last I heard of him he was done for pinching a shaving brush from Woolworth's and sentenced to eight years P.D. under the new act.

1999 L. Barnes Flashpoint 178 C–Carlotta, they gave me a P.D. It's all over his f–face how I've got a record and he's defending me because he's got to.

pd n. (also P.D.) potential difference, the difference in electric potential between two points.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > voltage > electrical potential > [noun]

tension1785

electric tension1802

potential1828

potential function1828

pd1887

pressure1889

potentiality1898

1887 W. E. Ayrton Pract. Electr. vii. 371 An influence machine can produce a P.D. between its terminals of some hundreds of thousands of volts.

1935 J. N. Friend Text-bk. Physical Chem. II. vii. 297 Experimental measurement of the P.D. between two liquids presents many difficulties.

1963 A. F. Abbott Ordinary Level Physics xxxvii. 487 The terminal p.d. is always less than the e.m.f., and the difference..represents the p.d. required to send the current through the internal resistance of the cell.

单词	pd
释义	Pdn. Brit. /piːˈdiː/, U.S. /piˈdi/ Origin: Formed within English, by clipping or shortening. Etymon: palladium n.² Etymology: Symbolic abbreviation for palladium n.² Chemistry. The element palladium. ΚΠ 1833 E. Turner Elements of Chem. (ed. 4) 971 Palladium..Pd. 1867 C. L. Bloxam Chem. 400 Of the oxides of palladium, two correspond with those of platinum, and a basic suboxide (Pd₂O) has been obtained by gently heating the protoxide. 1922 T. M. Lowry Inorg. Chem. xlii. 820 Palladium, Pd = 106.7, was discovered by Wollaston. 1988 F. A. Cotton & G. Wilkinson Adv. Inorg. Chem. (ed. 5) xix. 924 Palladium(II) acetate..is used as a source for other Pd compounds and has been greatly studied in a wide variety of Pd catalyzed reactions of organic compounds. 1993 Nature 1 Apr. 436/2 At 300 K, the atomic structure of pure Pd..is very regular and contains no explicit indication of where a crack might start forming. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). > as lemmas P.D. P.D. n. preventive detention; preventive detainee. ΘΚΠ society > law > administration of justice > general proceedings > arrest > [noun] > custody > type of free keeping1483 free ward1538 bail1581 preventive detention1858 preventive custody1897 P.D.1956 1956 ‘C. Raven’ Underworld Nights 30 The last I heard of him he was done for pinching a shaving brush from Woolworth's and sentenced to eight years P.D. under the new act. 1999 L. Barnes Flashpoint 178 C–Carlotta, they gave me a P.D. It's all over his f–face how I've got a record and he's defending me because he's got to. extracted from Pn. pd pd n. (also P.D.) potential difference, the difference in electric potential between two points. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > voltage > electrical potential > [noun] tension1785 electric tension1802 potential1828 potential function1828 pd1887 pressure1889 potentiality1898 1887 W. E. Ayrton Pract. Electr. vii. 371 An influence machine can produce a P.D. between its terminals of some hundreds of thousands of volts. 1935 J. N. Friend Text-bk. Physical Chem. II. vii. 297 Experimental measurement of the P.D. between two liquids presents many difficulties. 1963 A. F. Abbott Ordinary Level Physics xxxvii. 487 The terminal p.d. is always less than the e.m.f., and the difference..represents the p.d. required to send the current through the internal resistance of the cell. extracted from Pn. < n.1833 as lemmas
随便看	photolithotype photologic photological photologist photology photoluminescence photoluminescences photoluminescent photolyase photolyse photolysed photolyses photolysing photolysis photolytic photolytically photolyzable photolyze photolyzed photolyzes photolyzing photomacrograph photomacrographic photomacrography photomagnetic