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noun
The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or calcareous.
Definition source: English Wiktionary via Wiktextract
Topics: biology, history, human-sciences, natural-sciences, paleontology, sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From Ancient Greek προ- (pro-, “before”) + ὄστρᾰκον (óstrăkon, “shell”).
