meitnerium Syllabification: (meit·ner·i·um)Pronunciation: /mītˈni(ə)rēəm/Definition of meitnerium noun the chemical element of atomic number 109, a very unstable element made by high-energy atomic collisions. (Symbol: Mt)Origin:modern Latin, from the name of L. Meitner (see Meitner, Lise)meitnerium in other Oxford dictionaries Definition of meitnerium in the British & World English dictionary
