Ndn.
/ɛnˈdiː/, U.S. /ˌɛnˈdi/ Chemistry.
The element neodymium.
ΚΠ
1885 Jrnl. Chem. Soc. 48 1113 Neodymium, Nd, yields salts of splendid amethyst colour.
1922 T. M. Lowry Inorg. Chem. xxxiv. 668 Sulphates, such as neodymium sulphate Nd2(SO4)3,8H2O, which are much less soluble in hot than in cold water.
1984 N. N. Greenwood & A. Earnshaw Chem. of Elements (1986) xxx. 1446 A particularly interesting example is [Nd6(OPri)17Cl], made up of 6 Nd atoms held together around a central Cl atom.
This is a new entry (OED Third Edition, June 2003; most recently modified version published online March 2022).
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n.d.
n.d. n. (also N.D.) (of a book) no date.
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1834 William Pickering's Catal. Manuscripts & Bks. 19 Angler's Guide... Lond. n.d.
1879 Blackwell's Catal. No. i. 10 Chappell's Old English Ditties.. n.d.
1917 T. J. Wise Bibliogr. Brontë Family vi. 225 Museum of Brontë Relics... A Descriptive Catalogue. (N.D., but circa 1890).
1959 Notes & Queries July 292/1 A Chronicle History of Portsmouth by Henry Slight (3d. edit., n.p., n.d.).
1988 Nature 3 Nov. 26/3 Others are described as ‘Forthcoming 1987’ or just ‘n.d.’!
N.D.
N.D. n. North Dakota.
Π
1891 Amer. Missionary Apr. 131 (heading) Fort Berthold Agency, N.D.
1947 Amer. Speech 22 249 Mr. Bruce Nelson, of Bismarck, N.D., tells me that Dakotan now prevails [over Dakotian] in both Dakotas.
1993 Via Media/Episcopal Life Sept. 20/3 Gethsemane Cathedral, Fargo, N.D., looks like a 19th-century Gothic revival floor plan.
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