Dictionary.com

hahnium

[ hah-nee-uhm ]
/ ˈhɑ ni əm /
Save This Word!
noun Chemistry, Physics.
a proposed but never officially adopted name for element 105, which was instead named dubnium. Symbol: Ha
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?
His boss, whom he admires, is waiting to meet with him about the big project.
His boss, who he admires, is waiting to meet with him about the big project.
TAKE THE QUIZ TO FIND OUT
See also unnilpentium.

Origin of hahnium

First recorded in 1965–70; named after German chemist Otto Hahn; see -ium

Words nearby hahnium

Hague Tribunal, hah, ha-ha, Hahn, Hahnemann, hahnium, Haida, Haidarabad, Haidar Ali, Haidinger fringes, Haiduk
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

British Dictionary definitions for hahnium

hahnium
/ (ˈhɑːnɪəm) /
noun
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
FEEDBACK