Dbn.
/ˌdiːˈbiː/, U.S. /ˌdiˈbi/ 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.
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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.].
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n.1994as lemmas