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hahnium

[hah-nee-uh m] /ˈhɑ ni əm/
noun, Chemistry, Physics.
1.
a proposed name for dubnium. Symbol: Ha.
Also called unnilpentium, element 105.
Origin of hahnium
1965-1970
1965-70; after German chemist O. Hahn; see -ium
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for hahnium

hahnium

/ˈhɑːnɪəm/
noun
1.
a name once advanced by the American Chemical Society for a transuranic element, artificially produced from californium, atomic no: 105; half-life of most stable isotope, 262Ha: 40 seconds Now called dubnium
Word Origin
C20: named after Otto Hahn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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hahnium in Medicine

hahnium hah·ni·um (hä'nē-əm)
n.
Element 105.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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