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Meaning of protoconch | Babel Free

Noun CEFR B2

Definitions

The embryonic shell, or initial chamber, of ammonites and other cephalopods

CEFR level

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

See also

protocone protoconid protoconodont protocontinent protoconule protoconversation

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