technetium
Concise Oxford English Dictionary © 2008 Oxford University Press:
technetium /tɛkˈniːʃɪəm/
▶noun the chemical element of atomic number 43, an artificially made radioactive metal. (Symbol: Tc)
– origin 1940s: mod. L., from Gk tekhnētos ‘artificial’.
'technetium' also found in these Oxford entries:

