Prefix
cirro-
(meteorology) related to clouds of high étage
Stratocumuliform and stratiform clouds in the high étage carry the prefix cirro-, yielding the respective genus names cirrocumulus (Cc) and cirrostratus (Cs). Source: Internet
Stratocumuliform and stratiform genera have the prefix cirro- when they occur in the high étage, and alto- when based in the middle altitude range. Source: Internet
They are given the prefix "cirro-", but this refers more to their altitude range than their physical structure. Source: Internet