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actinium

[æk'tɪnɪəm] rzecz.
chem. aktiinium
actinium A radioactive element of the actinide series, occurring as a decay product of uranium. It is used as an alpha particle source and in neutron production [æk'tɪnɪəm] rzecz.
ochr.środ. aktiinium
 Angielski tezaurus
Actinium [æk'tɪnɪəm] skr.
skr., szkoc.ang. Ac