TECHNETIUM Meaning of TECHNETIUM in English [ tɛk'ni:ʃɪəm ]■ noun the chemical element of atomic number 43, an artificially made radioactive metal. (Symbol: Tc )Origin1940s: mod. L., from Gk tekhnētos 'artificial'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004