Nan.

Brit.

/ˌɛnˈeɪ/, U.S.

/ˌɛnˈeɪ/

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

Etymology: Symbolic abbreviation for natrium n., following the system introduced by Berzelius.

Chemistry.

The element sodium.

ΚΠ

1814 J. Black tr. J. J. Berzelius Attempt Sci. Syst. Mineral. 118 (table) Sodium... Na.

1877 H. E. Roscoe & C. Schorlemmer Treat. Chem. I. 345 Sodium disulphate Na₂S₂O₇ is obtained by heating the acid sodium sulphate HNaSO₄.

1907 G. S. Newth Text-bk. Inorg. Chem. (ed. 12) iii. i. 346 Their similarity in composition is expressed in the following formulæ:—... Compounds with sodium, NaF, NaCl, NaBr, NaI.

1952 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) xi. 478 One group..regulates the excretion of Na and Cl by the kidney.

1990 C. Pellant Rocks, Minerals & Fossils 92 Oligoclase has about 80 per cent Na and 20 per cent Ca.

This is a new entry (OED Third Edition, June 2003; most recently modified version published online March 2022).

naconj.

Brit.

/nə/, U.S.

/nə/, Scottish English

/nə/

Forms: Scottish pre-1700 nai, pre-1700 nay, pre-1700 1700s– na; English regional (north-western) 1900s– na.

Origin: Of uncertain origin. Perhaps a variant or alteration of another lexical item. Etymons: English na , no conj.¹

Etymology: Origin uncertain; perhaps a specific use of na, northern and Scots variant of no conj.¹ Compare ne conj.², no conj.², nor conj.² Sc. National Dict s.v. records the word as still in use in sense 1 in north-eastern Scotland, Angus, and Clackmannan in 1963, but regards it as obsolescent.

Scottish and English regional (north-western).

1. = than conj. Now rare.

ΚΠ

1424 Acts Parl. Scotl. (1814) II. 3/2 That na man..haif ma personis with him na may suffice..till his estate.

c1480 (a1400) St. Andrew 1103 in W. M. Metcalfe Legends Saints Sc. Dial. (1896) I. 95 Þe fend wes away in hy, sonare na ony man cuth thynke.

1488 (c1478) Hary Actis & Deidis Schir William Wallace (Adv.) (1968–9) v. l. 388 I meyn fer mar the tynsell off my men Na for my selff.

?1507 W. Dunbar Tua Mariit Wemen (Rouen) in Poems (1998) I. 48 Mar with wylis I wan na wichtnes of handis.

1533 J. Gau tr. C. Pedersen Richt Vay 94 Ramember that thy marcie and grace is..greittar nay al our sinnis.

1535 W. Stewart tr. H. Boethius Bk. Cron. Scotl. (1858) I. 271 Tha wald erar de Na with the Romanis to subdewit be.

1755 R. Forbes Ajax (rev. ed.) 20 He flegged starker fouk na' [1748 than] you.

1808 W. Watson Poems 34 A' thing gade righter na common.

1847 R. Chambers Pop. Rhymes Scotl. 183 [She] saw mae ferlies na fyfteen.

1889 J. M. Barrie Window in Thrums ii. 15 The big ane's bigger na usual.

1955 W. P. Milne Eppie Elrick v. 44 There 'e sat an' suppit an' suppit an' better na suppit.

1976 Jrnl. Lakeland Dial. Soc. 16 He was mear na seeventy when he gied ower.

†2. Than if. Obsolete. rare.

ΚΠ

c1485 ( G. Hay Bk. Law of Armys (2005) 284 Quhen he cummys furthwart on thre festuale dayes,..all the peple..press the mare to se him, na he rade euery day.

This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022).

> as lemmas

N.A. n. U.S. (now rare) National Academician; National Academy.

ΚΠ

1828 N. Amer. Rev. Jan. 207 The N.A. would do very well in the catalogue of their own exhibitions, to distinguish the works of its members.

1883 Harper's Mag. Nov. 843/2 He enjoys..the unusual distinction of being an N.A. and an A.R.A.

1924 Who's Who in Amer. 1706/1 Inness, George, Jr., painter;..A.N.A., 1895 N.A., 1899.

1949 Los Angeles Times 11 July ii. 4/2 Hugo Ballin, N.A.

NA n. Biochemistry noradrenaline.

ΚΠ

1956 U. S. von Euler Noradrenaline i. 3 The recognition of noradrenaline (NA) as a naturally occurring substance of high biological significance is of fairly late date.

1974 V. B. Mountcastle et al. Med. Physiol. (ed. 13) I. viii. 276/1 Disulfiram..inhibits the enzyme dopamine-β-hydroxylase and thus prevents the synthesis of NA from dopa.

1991 Pulse 6 Apr. 74/2 The current first (and urgent) choice of treatment is amitriptyline, an old and ‘dirty’ drug which appears..to be more effective than newer ‘clean’ pure NA or 5-HT re-uptake inhibitors.

NA n. Optics numerical aperture.

ΚΠ

1885 Jrnl. Royal Microsc. Soc. 5 209 Apertures are thus obtained ranging from 0.77 to 1.644 N.A. in flint, and 1.512 N.A. in crown.

1925 Nature 18 July 118/2 The N.A. of any objective used could not exceed about 1·27.

1977 J. Hedgecoe Photographer's Handbk. 113 Total magnification on a print or transparency should not exceed 1000 times the NA of the objective.

1992 Microelectronics Jrnl. 23 243/1 The stepper has a lens with a numerical aperture (NA) of 0.6.

单词	na
释义	Nan. Brit. /ˌɛnˈeɪ/, U.S. /ˌɛnˈeɪ/ Origin: Formed within English, by clipping or shortening. Etymon: natrium n. Etymology: Symbolic abbreviation for natrium n., following the system introduced by Berzelius. Chemistry. The element sodium. ΚΠ 1814 J. Black tr. J. J. Berzelius Attempt Sci. Syst. Mineral. 118 (table) Sodium... Na. 1877 H. E. Roscoe & C. Schorlemmer Treat. Chem. I. 345 Sodium disulphate Na₂S₂O₇ is obtained by heating the acid sodium sulphate HNaSO₄. 1907 G. S. Newth Text-bk. Inorg. Chem. (ed. 12) iii. i. 346 Their similarity in composition is expressed in the following formulæ:—... Compounds with sodium, NaF, NaCl, NaBr, NaI. 1952 G. H. Bourne Cytol. & Cell Physiol. (ed. 2) xi. 478 One group..regulates the excretion of Na and Cl by the kidney. 1990 C. Pellant Rocks, Minerals & Fossils 92 Oligoclase has about 80 per cent Na and 20 per cent Ca. This is a new entry (OED Third Edition, June 2003; most recently modified version published online March 2022). naconj. Brit. /nə/, U.S. /nə/, Scottish English /nə/ Forms: Scottish pre-1700 nai, pre-1700 nay, pre-1700 1700s– na; English regional (north-western) 1900s– na. Origin: Of uncertain origin. Perhaps a variant or alteration of another lexical item. Etymons: English na , no conj.¹ Etymology: Origin uncertain; perhaps a specific use of na, northern and Scots variant of no conj.¹ Compare ne conj.², no conj.², nor conj.² Sc. National Dict s.v. records the word as still in use in sense 1 in north-eastern Scotland, Angus, and Clackmannan in 1963, but regards it as obsolescent. Scottish and English regional (north-western). 1. = than conj. Now rare. ΚΠ 1424 Acts Parl. Scotl. (1814) II. 3/2 That na man..haif ma personis with him na may suffice..till his estate. c1480 (a1400) St. Andrew 1103 in W. M. Metcalfe Legends Saints Sc. Dial. (1896) I. 95 Þe fend wes away in hy, sonare na ony man cuth thynke. 1488 (c1478) Hary Actis & Deidis Schir William Wallace (Adv.) (1968–9) v. l. 388 I meyn fer mar the tynsell off my men Na for my selff. ?1507 W. Dunbar Tua Mariit Wemen (Rouen) in Poems (1998) I. 48 Mar with wylis I wan na wichtnes of handis. 1533 J. Gau tr. C. Pedersen Richt Vay 94 Ramember that thy marcie and grace is..greittar nay al our sinnis. 1535 W. Stewart tr. H. Boethius Bk. Cron. Scotl. (1858) I. 271 Tha wald erar de Na with the Romanis to subdewit be. 1755 R. Forbes Ajax (rev. ed.) 20 He flegged starker fouk na' [1748 than] you. 1808 W. Watson Poems 34 A' thing gade righter na common. 1847 R. Chambers Pop. Rhymes Scotl. 183 [She] saw mae ferlies na fyfteen. 1889 J. M. Barrie Window in Thrums ii. 15 The big ane's bigger na usual. 1955 W. P. Milne Eppie Elrick v. 44 There 'e sat an' suppit an' suppit an' better na suppit. 1976 Jrnl. Lakeland Dial. Soc. 16 He was mear na seeventy when he gied ower. †2. Than if. Obsolete. rare. ΚΠ c1485 ( G. Hay Bk. Law of Armys (2005) 284 Quhen he cummys furthwart on thre festuale dayes,..all the peple..press the mare to se him, na he rade euery day. This entry has been updated (OED Third Edition, June 2003; most recently modified version published online March 2022). > as lemmas NA NA n. chiefly U.S. = Narcotics Anonymous n. ΚΠ 1954 Sat. Evening Post 7 Aug. 49/1 Newcomers are advised to make their withdrawal first, then come to N.A. and learn to live without drugs. 1988 U. Padel & P. Stevenson Insiders (BNC) 46 She said sh'e give me something about it on Sunday at NA. 1995 New Yorker 30 Jan. 83/2 Gately personally is not hot on NA: so many relapses and unhumble returns. extracted from Nn. N.A. N.A. n. U.S. (now rare) National Academician; National Academy. ΚΠ 1828 N. Amer. Rev. Jan. 207 The N.A. would do very well in the catalogue of their own exhibitions, to distinguish the works of its members. 1883 Harper's Mag. Nov. 843/2 He enjoys..the unusual distinction of being an N.A. and an A.R.A. 1924 Who's Who in Amer. 1706/1 Inness, George, Jr., painter;..A.N.A., 1895 N.A., 1899. 1949 Los Angeles Times 11 July ii. 4/2 Hugo Ballin, N.A. extracted from Nn. NA NA n. Biochemistry noradrenaline. ΚΠ 1956 U. S. von Euler Noradrenaline i. 3 The recognition of noradrenaline (NA) as a naturally occurring substance of high biological significance is of fairly late date. 1974 V. B. Mountcastle et al. Med. Physiol. (ed. 13) I. viii. 276/1 Disulfiram..inhibits the enzyme dopamine-β-hydroxylase and thus prevents the synthesis of NA from dopa. 1991 Pulse 6 Apr. 74/2 The current first (and urgent) choice of treatment is amitriptyline, an old and ‘dirty’ drug which appears..to be more effective than newer ‘clean’ pure NA or 5-HT re-uptake inhibitors. extracted from Nn. NA NA n. Optics numerical aperture. ΚΠ 1885 Jrnl. Royal Microsc. Soc. 5 209 Apertures are thus obtained ranging from 0.77 to 1.644 N.A. in flint, and 1.512 N.A. in crown. 1925 Nature 18 July 118/2 The N.A. of any objective used could not exceed about 1·27. 1977 J. Hedgecoe Photographer's Handbk. 113 Total magnification on a print or transparency should not exceed 1000 times the NA of the objective. 1992 Microelectronics Jrnl. 23 243/1 The stepper has a lens with a numerical aperture (NA) of 0.6. extracted from Nn. N.A. N.A. adj. and n. (a) adj. North American; (b) n. North America. Π 1817 N. Amer. Rev. July 199 See notes on the third Satire, in the N.A. Review, for January. 1900 Naval & Mil. Rev. July 5 Name of Vessel. Pearl. Present Station. N.A. and W.I. 1990 D. Millar Special Effects (BNC) 11 The death scene at the end of Bonnie and Clyde (1967, NA rentals $27.8 million) is clearly an instance of ‘realism’. extracted from Nn. < n.1814conj.1424 as lemmas
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