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actinium [æk'tɪnɪəm] n
gen.	Actinium n
chem.	Aktinium n; Actinium n (Ac)
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] n
environ.	Actinium n
English thesaurus
Actinium [æk'tɪnɪəm] abbr.
abbr., scottish	Ac

Actinium: 149 phrases in 5 subjects

Chemistry	5
Nuclear physics	9
Physics	4
Technology	3
Радиоактивное излучение	128