hassium
noun
has·si·um ˈha-sē-əm 
: a short-lived radioactive metallic element produced artificially see Chemical Elements Table
Word History
Etymology
New Latin, from Hassia Hesse (German state), location of the laboratory that first produced the element
First Known Use
1992, in the meaning defined above
Medical Definition
hassium
noun
has·si·um
ˈha-sē-əm
: a short-lived radioactive element produced artificially —symbol Hs see Chemical Elements Table