Din.
/ˌdiːˈʌɪ/, U.S. /ˌdiˈaɪ/ Chemistry. Now disused.
Didymium.Didymium was once believed to be an element, but is now known to be a mixture of neodymium and praseodymium.
ΚΠ
1844 Lancet 19 Oct. 93/1 (table) Di. Didymium.
1849 H. Watts tr. L. Gmelin Hand-bk. Chem. III. 274 Parisite, a new cerium mineral discovered in New Granada, by L.Spada... Contains in 100 parts: cerium, &c. 50·78, calcium 8·29.., = 8(CeO, LaO, DiO; CaO)CO2 + (CeO, LaO, DiO)HO + 2Ca F.
1882 H. Watts Dict. Chem. ii. 321 Didymium, symbol Di. Atomic weight 48.—This metal, discovered by Mosander in 1841..exists, together with cerium and lanthanum, in cerite, allanite, orthite, yttrocerite, cryptolite, and a few other minerals.
1921 A. M. Comey & D. A. Hahn Dict. Chem. Solubilities (ed. 2) 330/1 Didymium sulphide, Di2S2. Insol. in H2O.
1967 U.S. Geol. Surv. Professional Paper No. 530. 3/2 The symbol Di is no longer employed in chemistry but has been retained here to show what the analyst originally reported.
This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022).
> see also
also refers to : di-prefix1
also refers to : di-prefix2
also refers to : di-comb. form
> as lemmas
di.
d adj. (in dental formulæ) = deciduous, as dc., deciduous canine, di., deciduous incisor.
D.I.
D.I. n. Defence Intelligence.
Π
1964 Observer 12 July 36/6 According to the Security Gazette, the Secret Service, MI5, is now known as DI5.
1966 J. Porter Sour Cream ii. 20 We had several lectures from a languid D.I.5 man.
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n.1844see also
as lemmas