Dbn.

Brit.

/ˌdiːˈbiː/, U.S.

/ˌdiˈbi/

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

Etymology: Symbolic abbreviation for dubnium n.

Chemistry.

1. (A symbol proposed for) a chemical element, atomic number 104, once called dubnium, now called rutherfordium. Now disused.

ΚΠ

1994 Sci. News 22 Oct. 271/2 (table) 104. Dubnium. Db.

1995 Age (Melbourne) (Nexis) 19 June 4 IUPACU's Commission on Nomenclature of Inorganic Chemistry in August last year selected the name dubnium (Db) for element 104.

2. The element dubnium, atomic number 105.

ΚΠ

1997 N.Y. Times 4 Mar. c6 These will be the names of the six new elements: Element 104, Rutherfordium (symbol Rf); Element 105, Dubnium (symbol Db) [etc.].

2003 Catalysis Today 78 15/1 The melting temperature..is estimated for Db₂O₅ to be greater than 2000°C.

2007 Nucl. Physics A. 787 390c It has been shown experimentally that Db behaves like the +5 species, Nb and Ta.

This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022).

单词	db
释义	Dbn. Brit. /ˌdiːˈbiː/, U.S. /ˌdiˈbi/ Origin: Formed within English, by clipping or shortening. Etymon: dubnium n. Etymology: Symbolic abbreviation for dubnium n. Chemistry. 1. (A symbol proposed for) a chemical element, atomic number 104, once called dubnium, now called rutherfordium. Now disused. ΚΠ 1994 Sci. News 22 Oct. 271/2 (table) 104. Dubnium. Db. 1995 Age (Melbourne) (Nexis) 19 June 4 IUPACU's Commission on Nomenclature of Inorganic Chemistry in August last year selected the name dubnium (Db) for element 104. 2. The element dubnium, atomic number 105. ΚΠ 1997 N.Y. Times 4 Mar. c6 These will be the names of the six new elements: Element 104, Rutherfordium (symbol Rf); Element 105, Dubnium (symbol Db) [etc.]. 2003 Catalysis Today 78 15/1 The melting temperature..is estimated for Db₂O₅ to be greater than 2000°C. 2007 Nucl. Physics A. 787 390c It has been shown experimentally that Db behaves like the +5 species, Nb and Ta. This is a new entry (OED Third Edition, December 2013; most recently modified version published online March 2022). > as lemmas db. db. n. decibel. ΘΚΠ the world > matter > physics > science of sound > [noun] > unit of sound decibel1928 phon1932 phonon1932 PNdB1959 db.1975 1975¹ [see dbx n.]. extracted from Dn. < n.1994 as lemmas
随便看	θ115166 θ115167 θ115168 θ115169 θ11517 θ115170 θ115171 θ115172 θ115173 θ115174 θ115175 θ115176 θ115177 θ115178 θ115179 θ11518 θ115180 θ115181 θ115182 θ115183 θ115184 θ115185 θ115186 θ115187 θ115188

Dbn.

> as lemmas