释义 |
pro·os·tra·cum \prōˈästrə̇kəm\ noun (plural proostra·ca \-kə\) Etymology: New Latin, from pro- (I) + Greek ostrakon earthen vessel, potsherd, shell — more at oyster : the anterior horny or calcareous prolongation of the phragmocone of belemnites and related cephalopods |