eka-actinium
UnbiuniumUnbiunium (element 121)
Meaning
2 senses(uncountable)Unbiunium (element 121)
(uncountable)Untriennium (dvi-lanthanum) (element 139)
Origin
From eka- + actinium.From eka- + actinium.
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Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable