from The Century Dictionary.

  • noun Cumulus developing toward the formation of rain, but from which little rain has yet fallen. See cloud.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Alternative form of cumulonimbus.


Sorry, no etymologies found.


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  • So unless you are going to be a smart-arse and start the journey with a C and only inform your three-year-old the answer was "cumulo-nimbus cloud" when you get to Cornwall seven hours later, then it's a non-starter.

    Why I-spy is bad for long car journeys

  • As we left that set that day, the memories of Osama Bin Laden and the havoc he created in this country were but a cumulo-nimbus cloud pushed back to the recesses of my mind.

    Michealene Cristini Risley: Time to Heal Osama Trauma to the American Psyche

  • They had emerged at the top of the high-stacked cumulo-nimbus, and now began lazily to drift down its contours, as Fenchurch eased Arthur in turn from his clothes, prised him free of them till all were gone, winding their surprised way down into the enveloping whiteness.

    So long, and thanks for all the fish

  • His ship began plunging recklessly into a floor of dirty gray cotton, thick cumulo-nimbus clouds.

    Splinter Of The Mind's Eye

  • His ship began plunging recklessly into a floor of dirty gray cotton, thick cumulo-nimbus clouds.

    Splinter Of The Mind's Eye

  • At lower levels, rising pockets of heat from the built-up areas bumped the - aeroplane about like a iuppet, and to enormous heights great heaps of cumulo-nimbus cloud were boiling up all round the horizon.

    Rat Race

  • The clouds were bubbling up towards them, and perhaps it was on account of that great mystification of cumulus and cumulo-nimbus, the mighty rolling thunderheads standing like hammers in the dawn, or perhaps it was the singing

    The Satanic Verses

  • At half past two in the afternoon it was as dark as twilight and out of the great black wall of cumulo-nimbus that all but surrounded us the wind flung itself upon the X 13, as if it were going to uproot it from its thirteen-leg foundation, topple it and drown it in the depths of the sea.

    Fear is the Key

  • You can see now, "he continued," how the thunder heads of cumulo-nimbus are beginning to show, leaden in color below, with the white billowy tops.

    The Boy with the U. S. Weather Men

  • We're talking a full spectrum onslaught from the angry cumulo-nimbus above.

    Laurie Kendrick


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