phragmocone

基本解释

• (软体动物的)闭锥

同根派生

英汉例句

• 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.
  乌贼的化石，圆锥形石灰质化石，许多灭绝的头足类动物。
• 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
  乌贼的化石，圆锥形石灰质化石，许多灭绝的头足类动物