Aun.

Brit.

/ˌeɪˈjuː/, U.S.

/ˌeɪˈju/

Origin: Formed within English, by clipping or shortening; modelled on a Latin lexical item. Etymon: gold n.¹

Etymology: Symbolic abbreviation for gold n.¹, after use as symbolic abbreviation for classical Latin aurum (see auro- comb. form) in the system introduced by Berzelius (see quot. 1814).

Chemistry.

The element gold.

ΘΚΠ

the world > matter > chemistry > elements and compounds > metals > specific elements > gold > [noun]

goldeOE

Au1814

yellow1858

1814 tr. J. J. Berzelius in Ann. Philos. 3 255 I have proved that gold forms two salifiable oxides..the oxides Au+O, Au+3O, combine with acids.

1876 Pharmaceut. Jrnl. & Trans. 23 Sept. 258/1 A gold salt containing 20·68 per cent. of Au.

1955 R. M. Pearl How to know Minerals & Rocks 62 Native gold (Au) is never found entirely pure.

2005 Nature 20 Oct. 1098/3 It was..experimentally confirmed, that the positive gold ion Au³⁺ can catalyse the hydrochlorination of acetylene.

This is a new entry (OED Third Edition, June 2011; most recently modified version published online December 2021).

> as lemmas

AU n. (also ÅU) Physics Ångström (or Ångström's) unit; cf. sense 17.

ΚΠ

1894 Astron. & Astrophysics 13 373 The table and drawing show with a slit-width of 10 Angström's units all five maxima, but each is displaced 5 A. U. towards the violet.

1929 Jrnl. Sci. Instruments 6 2 An actinometer which was sensitive in the region 2950–3900 å.u.

2006 D. Jubb Jubbs Cell Rejuvenation i. 32 The color red is 8000 AU.

au n. Astronomy astronomical unit.

ΘΚΠ

the world > the universe > cosmology > science of observation > astronomical calculation > [noun] > unit

hour1777

astronomical unit1848

gravitational system1888

au1910

parsec1913

1910 Outlook 16 July 568 We find Mercury about .4 of an astronomical unit (A. U.) from the sun.

1984 Aviation Week & Space Technol. 2 Jan. 48/3 Halley will be..0·97 AU from Earth at the time of the Giotto encounter.

2009 Lewiston (Idaho) Morning Tribune (Nexis) 15 Jan. Uranus orbits the sun at an average distance of 19.2 AU.

单词	au
释义	Aun. Brit. /ˌeɪˈjuː/, U.S. /ˌeɪˈju/ Origin: Formed within English, by clipping or shortening; modelled on a Latin lexical item. Etymon: gold n.¹ Etymology: Symbolic abbreviation for gold n.¹, after use as symbolic abbreviation for classical Latin aurum (see auro- comb. form) in the system introduced by Berzelius (see quot. 1814). Chemistry. The element gold. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > gold > [noun] goldeOE Au1814 yellow1858 1814 tr. J. J. Berzelius in Ann. Philos. 3 255 I have proved that gold forms two salifiable oxides..the oxides Au+O, Au+3O, combine with acids. 1876 Pharmaceut. Jrnl. & Trans. 23 Sept. 258/1 A gold salt containing 20·68 per cent. of Au. 1955 R. M. Pearl How to know Minerals & Rocks 62 Native gold (Au) is never found entirely pure. 2005 Nature 20 Oct. 1098/3 It was..experimentally confirmed, that the positive gold ion Au³⁺ can catalyse the hydrochlorination of acetylene. This is a new entry (OED Third Edition, June 2011; most recently modified version published online December 2021). > as lemmas AU AU n. (also ÅU) Physics Ångström (or Ångström's) unit; cf. sense 17. ΚΠ 1894 Astron. & Astrophysics 13 373 The table and drawing show with a slit-width of 10 Angström's units all five maxima, but each is displaced 5 A. U. towards the violet. 1929 Jrnl. Sci. Instruments 6 2 An actinometer which was sensitive in the region 2950–3900 å.u. 2006 D. Jubb Jubbs Cell Rejuvenation i. 32 The color red is 8000 AU. extracted from An. au au n. Astronomy astronomical unit. ΘΚΠ the world > the universe > cosmology > science of observation > astronomical calculation > [noun] > unit hour1777 astronomical unit1848 gravitational system1888 au1910 parsec1913 1910 Outlook 16 July 568 We find Mercury about .4 of an astronomical unit (A. U.) from the sun. 1984 Aviation Week & Space Technol. 2 Jan. 48/3 Halley will be..0·97 AU from Earth at the time of the Giotto encounter. 2009 Lewiston (Idaho) Morning Tribune (Nexis) 15 Jan. Uranus orbits the sun at an average distance of 19.2 AU. extracted from An. < n.1814 as lemmas
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