al·​to·​cu·​mu·​lus | \ ˌal-tō-ˈkyü-myə-ləs How to pronounce altocumulus (audio) \
plural altocumuli\ ˌal-​tō-​ˈkyü-​myə-​ˌlī How to pronounce altocumulus (audio) , -​ˌlē \

Definition of altocumulus

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

Examples of altocumulus in a Sentence

Recent Examples on the Web The altocumulus floccus clouds, though, showed that a combination of instability (due to the puffy nature of the clouds) and moisture (the clouds already being there) were already present by Wednesday morning. Chris Bianchi, The Denver Post, 3 June 2020 Mid-level clouds are usually gray and are identified as either altocumulus, altostratus, or nimbostratus. Catherine Zuckerman, National Geographic, 24 Apr. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'altocumulus.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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

Learn More About altocumulus

Time Traveler for altocumulus

Time Traveler

The first known use of altocumulus was in 1881

See more words from the same year

Dictionary Entries Near altocumulus

alto clef


altocumulus castellatus

See More Nearby Entries 

Statistics for altocumulus

Cite this Entry

“Altocumulus.” Dictionary, Merriam-Webster, Accessed 4 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on altocumulus Encyclopedia article about altocumulus


Test Your Vocabulary

Name that Thing: Flower Edition

Name That Thing

Test your visual vocabulary with our 10-question challenge!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!