/ ˈæstətiːn; NAmE / noun
[ U ] ( symb At ) a chemical element. Astatine is a radioactive element which is found in small amounts in nature, and is produced artificially for use in medicine.
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WORD ORIGIN
1940s: from Greek astatos unstable + -ine .
/ ˈæstətiːn; NAmE / noun
[ U ] ( symb At ) a chemical element. Astatine is a radioactive element which is found in small amounts in nature, and is produced artificially for use in medicine.
••
WORD ORIGIN
1940s: from Greek astatos unstable + -ine .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005