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Meaning of cumulus

cu•mu•lus

Pronunciation: (ky'myu-lus), [key]
— pl. -lus.
  1. a heap; pile.
  2. a cloud of a class characterized by dense individual elements in the form of puffs, mounds, or towers, with flat bases and tops that often resemble cauliflower: as such clouds develop vertically, they form cumulonimbus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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