/ ˈlænθənəm; NAmE / noun
[ U ] ( symb La ) a chemical element. Lanthanum is a silver-white metal.
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WORD ORIGIN
mid 19th cent.: from Greek lanthanein escape notice (because it was long undetected in cerium oxide) + -um .
/ ˈlænθənəm; NAmE / noun
[ U ] ( symb La ) a chemical element. Lanthanum is a silver-white metal.
••
WORD ORIGIN
mid 19th cent.: from Greek lanthanein escape notice (because it was long undetected in cerium oxide) + -um .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005