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Meaning of eka-actinium | Babel Free

Noun CEFR C1

Definitions

unbiunium (element 121)
uncountable
untriennium (dvi-lanthanum) (element 139)
uncountable

CEFR level

C1

Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

eka-aluminium eka-aluminum eka-astatine eka-bismuth eka-boron eka-caesium