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protolith

Noun CEFR B2
ˈpɹoʊ.təˌlɪθ

Definitions

The original precursor of any specified metamorphic rock

CEFR level

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

protologism protologist protologue protology protoloph protolophid

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