proostracum
noun
pro·os·tra·cum
prōˈästrə̇kəm
plural proostraca
-kə
: the anterior horny or calcareous prolongation of the phragmocone of belemnites and related cephalopods
Word History
Etymology
New Latin, from pro- entry 1 + Greek ostrakon earthen vessel, potsherd, shell
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- finaller
- finallest
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- finalliest
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