乌贼的化石，圆锥形石灰质化石，许多灭绝的头足类动物

乌贼的化石，圆锥形石灰质化石，许多灭绝的头足类动物的英文翻译

基本释义

• 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