Definition of altocumulus noun from the Oxford Advanced American Dictionary

 

altocumulus

 noun
noun
NAmE//ˌæltoʊˈkyumyʊləs//
 
[uncountable, countable](pl. altocumuli
NAmE//ˌæltoʊˈkyumyʊlaɪ//
 
)
(technology)
 
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a layer of round clouds with flat bottoms lying at medium height, or one of the clouds which form this layer
See the Oxford Advanced Learner's Dictionary entry: altocumulus