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Meaning of protoplanetary nebula | Babel Free

Noun CEFR B2

Definitions

A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.

CEFR level

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

See also

protoplanetesimal Protoplasm Protoplasmic protoplasmodium protoplast protoplastid

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