altocumulus

noun
al·​to·​cu·​mu·​lus | \ˌal-tō-ˈkyü-myə-ləs \
plural altocumuli\-​ˌlī, -​ˌlē \

Definition of altocumulus 

: a fleecy mid-altitude cloud formation consisting of large whitish globular masses with shaded portions — see cloud illustration

First Known Use of altocumulus

1881, in the meaning defined above

History and Etymology for altocumulus

New Latin, from Latin altus + New Latin -o- + cumulus

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The first known use of altocumulus was in 1881

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