[ hah-nee-uhm ]
/ ˈhɑ ni əm /
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noun Chemistry, Physics.
a proposed name for dubnium, never officially adopted. Symbol: Ha
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Also called un·nil·pen·ti·um [yoo-nil-pen-tee-uhm], /ˌyu nɪlˈpɛn ti əm/, element 105 .
Words nearby hahnium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
British Dictionary definitions for hahnium
/ (ˈhɑːnɪəm) /
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, 262 Ha: 40 secondsNow called dubnium
Word Origin for hahnium
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