cumulonimbus

n. 积雨云

名词复数:cumulonimbuses 

cu.mu.lo.nim.bus

n.（名词）
【复数】 cu.mu.lo.nim.bus.es 或 cu.mu.lo.nim.bi [-bo]
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