a globular cloud at an intermediate height of about 2400 to 6000 metres (8000 to 20 000 feet)
WordReference Random House Unabridged Dictionary of American English © 2025
al•to•cu•mu•lus
(al′tō kyo̅o̅′myə ləs),USA pronunciation n., pl. -lus. [Meteorol.]
- Meteorologya cloud of a class characterized by globular masses or rolls in layers or patches, the individual elements being larger and darker than those of cirrocumulus and smaller than those of stratocumulus: of medium altitude, about 8000–20,000 ft. (2450–6100 m).
- alto- + cumulus 1890–95
Collins Concise English Dictionary © HarperCollins Publishers::
'altocumulus' also found in these entries (note: many are not synonyms or translations):