柯林斯詞典cumulus /?kju?mj?l?s/ (cumuli/?kju?mj?la?/) 1. N-VAR Cumulus is a type of thick white cloud formed when hot air rises very quickly. 積云 ...huge cumulus clouds. ...巨大的積云。 返回 cumulus劍橋詞典a type of tall , white cloud with a wide , flat base and rounded shape 積云 比較cirrus nimbus stratus 返回 cumulus