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Meaning of hesperium | Babel Free

Noun CEFR B2

Definitions

A rejected name for plutonium. (Esperium chemical symbol: Es)

obsolete, uncountable

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

hesperocyonine hesperomyine hesperornithean hesperornithid hesperornithiform hesperornithiforms