cirrocumulus
noun [ U ] environment specialized uk/ˌsɪr.əʊˈkjuː.mjə.ləs/ us/ˌsɪr.oʊˈkjuː.mjə.ləs/
卷积云（一种稀薄的高空云，由一系列规则排列的白云堆积形成,底部扁平）
a type of cumulus (= a tall, rounded, white cloud with a flat base) formed in a very thin layer and often in a regular pattern
Compare: altocumulusstratocumulus