Definitions

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  • noun chemistry, obsolete A rejected name for dubnium.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a transuranic element

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  • former US-proposed name (symbol Ha) for element 105, now called dubnium; and former IUPAC-proposed name (symbol Hn) for element 108, now called hassium; after physicist Otto Hahn

    July 10, 2008