belemnites

英 [be'ləmnaɪts] 美 [be'ləmnaɪts]

• 箭石类

英英释义

名词 belemnite:

1. a conical calcareous fossil tapering to a point at one end and with a conical cavity at the other end containing (when unbroken) a small chambered phragmocone from the shell of any of numerous extinct cephalopods of the family Belemnitidae