Meaning of altocumulus

al•to•cu•mu•lus

Pronunciation: (al"tō-ky'myu-lus), [key]
— pl. -lus.
  1. a 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).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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