cumulus

名词 cumulus:

1. a globular cloud
   同义词：cumulus cloud
2. a collection of objects laid on top of each other
   同义词：pile, heap, mound, agglomerate, cumulation

cu.mu.lus

n.（名词）
【复数】 cu.mu.li[-lo.]
A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses.
积云：一种浓密、平底状的白色云块，有一个多重圆形的顶部和界线分明的轮廓，通常是由不稳定的热气团上升形成的
A pile, mound, or heap.
一堆，一垛，堆积物

来源：
Latin [heap] * see keu…-
拉丁语 [堆积物] *参见 keu…-