IPA: //ˌæl.təˈkjuː.mə.ləs//
KK: /æltoʊˈkjuːmələs/
A type of cloud that appears as rounded, fluffy white or gray patches in the sky, usually found at a middle altitude.
The sky was filled with altocumulus clouds, creating a beautiful pattern above.
Altocumulus is formed from "alto-" (from Latin "altus", meaning high) and "cumulus" (from Latin "cumulus", meaning heap or mass). The word describes a type of cloud that appears as a high heap or mass in the sky.
Think of 'high' ('alto-') clouds that look like 'heaps' ('cumulus') in the sky — that's what altocumulus refers to.