phragmocone
基本解释
- (软体动物的)闭锥
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