ウンウンビウムMeanings1nounununbium (Uub)obsolete termObsolete systematic element name for copernicium (Cn), formerly used before the element was officially named. Now only of historical interest.See also: コペルニシウムウンウンビウムは、現げん在ざいではコペルニシウムと呼よばれている。Ununbium is now called copernicium.