Cumulus

ahd-5
  • noun. A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses.
  • noun. A pile, mound, or heap.
  • The Century Dictionary and Cyclopedia
  • noun. The kind of cloud which appears in the form of rounded heaps or hills, snowy-white at top with a darker horizontal base, characteristic of mild, calm weather, especially in summer; the summer-day cloud. See cut under cloud, 1.
  • noun. In anatomy, a heap of cells surrounding a ripe ovum in the Graafian follicle, and constituting the discus proligerus.
  • the GNU version of the Collaborative International Dictionary of English
  • noun. One of the four principal forms of clouds. Seecloud.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A large white puffy cloud that develops through convection. On a hot, humid day, they can form towers and even become cumulonimbus clouds.
  • noun. A mound or heap.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • noun. a collection of objects laid on top of each other
  • noun. a globular cloud
  • Word Usage
    "The word cumulus has a root similar to accumulate and means “piled up.”"
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    cloud  cumuli