roentgenium

noun

roent·​gen·​i·​um rent-ˈge-nē-əm 

rənt-,

-ˈje-

: a short-lived radioactive element produced artificially see Chemical Elements Table

Word History

Etymology

New Latin; from the fact that the element was synthesized on the centennial of Röntgen's discovery of X-rays

First Known Use

2004, in the meaning defined above

Kids Definition

roentgenium

noun

roent·​gen·​i·​um

rent-ˈgən-ē-əm,

rənt-,

-ˈjen-

: a short-lived radioactive element produced artificially see element