TERBIUM Meaning of TERBIUM in English [ 'tə:bɪəm ]■ noun the chemical element of atomic number 65, a silvery-white metal of the lanthanide series. (Symbol Tb )OriginC19: mod. L., from Ytterby (see yt~ ). Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004