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exthorio

Noun CEFR B2

Definitions

Synonym of thoron (“radon-220”).

obsolete, uncountable

Equivalents

Françaisexthorio

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
See all B2 English words →

See also

extillation extimacy extimate extimulation Extinct extinct language

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