名詞 cumulus:

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

cu.mu.lus

n.（名詞）
【復(fù)數(shù)】 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.
積云：一種濃密、平底狀的白色云塊，有一個多重圓形的頂部和界線分明的輪廓，通常是由不穩(wěn)定的熱氣團上升形成的
A pile, mound, or heap.
一堆，一垛，堆積物

來源：
Latin [heap] * see keu…-
拉丁語 [堆積物] *參見 keu…-