stratocumulus
noun [ U ] environment specialized uk/ˈstræt.əʊˌkjuː.mjə.ləs/ us/ˈstræt̬.oʊˌkjuː.mjə.ləs/
层积云
a type of cumulus (= tall, rounded, white cloud with a flat base) formed in a thick layer and found at low height
Compare: altocumuluscirrocumulus