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Meaning of orphan source | Babel Free

Noun CEFR B2

Definitions

A self-contained radioactive source that is no longer under regulatory control, for example because it has been abandoned or misplaced.

CEFR level

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

See also

orphan star orphan tears orphan train orphan work orphan-crushing machine orphan's court

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