An extremely dense,vertically developed cumulus with a relatively hazy outline and a glaciated top extending to great heights,usually producing heavy rains,thunderstorms,or hailstorms.

• 积雨云，一种极其浓密的、垂直扩展的积云，其轮廓比较模糊，顶部覆有冰晶且向上伸入高空，通常能产生大雨、雷暴或雹暴。